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20142354 = 234317789
BaseRepresentation
bin100110011010…
…1100100010010
31101220100010010
41030311210102
520124023404
61555415350
7333131031
oct114654422
941810103
1020142354
1110408281
1268b4556
13423316b
142964718
151b7d189
hex1335912

20142354 has 16 divisors (see below), whose sum is σ = 40383360. Its totient is φ = 6697680.

The previous prime is 20142349. The next prime is 20142359. The reversal of 20142354 is 45324102.

It is an interprime number because it is at equal distance from previous prime (20142349) and next prime (20142359).

It is a super-2 number, since 2×201423542 = 811428849322632, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20142354.

It is not an unprimeable number, because it can be changed into a prime (20142359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1309 + ... + 6480.

It is an arithmetic number, because the mean of its divisors is an integer number (2523960).

Almost surely, 220142354 is an apocalyptic number.

20142354 is an abundant number, since it is smaller than the sum of its proper divisors (20241006).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20142354 is a wasteful number, since it uses less digits than its factorization.

20142354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8225.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 20142354 is about 4488.0233956609. The cubic root of 20142354 is about 272.0842533832.

Adding to 20142354 its reverse (45324102), we get a palindrome (65466456).

The spelling of 20142354 in words is "twenty million, one hundred forty-two thousand, three hundred fifty-four".

Divisors: 1 2 3 6 431 862 1293 2586 7789 15578 23367 46734 3357059 6714118 10071177 20142354