20156365630464 has 176 divisors, whose sum is σ = 61405775778048. Its totient is φ = 5758319443968.

The previous prime is 20156365630369. The next prime is 20156365630547. The reversal of 20156365630464 is 46403656365102.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212992822 + ... + 213087434.

Almost surely, 2^{20156365630464} is an apocalyptic number.

20156365630464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20156365630464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30702887889024).

20156365630464 is an abundant number, since it is smaller than the sum of its proper divisors (41249410147584).

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

20156365630464 is an equidigital number, since it uses as much as digits as its factorization.

20156365630464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104550 (or 104532 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 51.

The spelling of 20156365630464 in words is "twenty trillion, one hundred fifty-six billion, three hundred sixty-five million, six hundred thirty thousand, four hundred sixty-four".