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20130254 = 219152697
BaseRepresentation
bin100110011001…
…0100111001110
31101212201111222
41030302213032
520123132004
61555243342
7333050534
oct114624716
941781458
1020130254
11103aa181
1268a9552
13422a7c1
142960154
151b797be
hex13329ce

20130254 has 8 divisors (see below), whose sum is σ = 30354048. Its totient is φ = 10012240.

The previous prime is 20130251. The next prime is 20130281. The reversal of 20130254 is 45203102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×201302542 = 810454252209032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20130251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25967 + ... + 26730.

It is an arithmetic number, because the mean of its divisors is an integer number (3794256).

Almost surely, 220130254 is an apocalyptic number.

20130254 is a deficient number, since it is larger than the sum of its proper divisors (10223794).

20130254 is a wasteful number, since it uses less digits than its factorization.

20130254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52890.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 20130254 is about 4486.6751609627. The cubic root of 20130254 is about 272.0297599358.

Adding to 20130254 its reverse (45203102), we get a palindrome (65333356).

The spelling of 20130254 in words is "twenty million, one hundred thirty thousand, two hundred fifty-four".

Divisors: 1 2 191 382 52697 105394 10065127 20130254