20156361853472 has 48 divisors (see below), whose sum is σ = 43777689325272. Its totient is φ = 9076035348480.

The previous prime is 20156361853471. The next prime is 20156361853483. The reversal of 20156361853472 is 27435816365102.

It can be written as a sum of positive squares in 4 ways, for example, as 10882899557776 + 9273462295696 = 3298924^2 + 3045236^2 .

It is not an unprimeable number, because it can be changed into a prime (20156361853471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 590870663 + ... + 590904774.

Almost surely, 2^{20156361853472} is an apocalyptic number.

It is an amenable number.

20156361853472 is an abundant number, since it is smaller than the sum of its proper divisors (23621327471800).

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

20156361853472 is a wasteful number, since it uses less digits than its factorization.

20156361853472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181775501 (or 1181775493 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 53.

The spelling of 20156361853472 in words is "twenty trillion, one hundred fifty-six billion, three hundred sixty-one million, eight hundred fifty-three thousand, four hundred seventy-two".