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20321242 = 211389917
BaseRepresentation
bin100110110000…
…1001111011010
31102020102111121
41031201033122
520200234432
62003315454
7334504414
oct115411732
942212447
1020321242
111051a717
12697bb8a
134296706
1429ad9b4
151bb6197
hex13613da

20321242 has 8 divisors (see below), whose sum is σ = 30751956. Its totient is φ = 10070592.

The previous prime is 20321237. The next prime is 20321243. The reversal of 20321242 is 24212302.

It can be written as a sum of positive squares in 2 ways, for example, as 19971961 + 349281 = 4469^2 + 591^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20321243) 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, 44733 + ... + 45184.

Almost surely, 220321242 is an apocalyptic number.

20321242 is a deficient number, since it is larger than the sum of its proper divisors (10430714).

20321242 is a wasteful number, since it uses less digits than its factorization.

20321242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90032.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20321242 is about 4507.9088278269. The cubic root of 20321242 is about 272.8873575373.

Adding to 20321242 its reverse (24212302), we get a palindrome (44533544).

The spelling of 20321242 in words is "twenty million, three hundred twenty-one thousand, two hundred forty-two".

Divisors: 1 2 113 226 89917 179834 10160621 20321242