23156398242 has 12 divisors (see below), whose sum is σ = 50172196230. Its totient is φ = 7718799408.

The previous prime is 23156398211. The next prime is 23156398253. The reversal of 23156398242 is 24289365132.

23156398242 is a `hidden beast` number, since 2 + 3 + 1 + 5 + 639 + 8 + 2 + 4 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 23082421041 + 73977201 = 151929^2 + 8601^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 643233267 + ... + 643233302.

Almost surely, 2^23156398242 is an apocalyptic number.

23156398242 is an abundant number, since it is smaller than the sum of its proper divisors (27015797988).

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

23156398242 is a wasteful number, since it uses less digits than its factorization.

23156398242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286466577 (or 1286466574 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The spelling of 23156398242 in words is "twenty-three billion, one hundred fifty-six million, three hundred ninety-eight thousand, two hundred forty-two".