20015256163212 has 36 divisors (see below), whose sum is σ = 51961528391136. Its totient is φ = 6491434430880.

The previous prime is 20015256163181. The next prime is 20015256163241. The reversal of 20015256163212 is 21236165251002.

20015256163212 is a `hidden beast` number, since 2 + 0 + 0 + 1 + 5 + 2 + 5 + 6 + 1 + 632 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×20015256163212² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7513232964 + ... + 7513235627.

Almost surely, 2^{20015256163212} is an apocalyptic number.

It is an amenable number.

20015256163212 is an abundant number, since it is smaller than the sum of its proper divisors (31946272227924).

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

20015256163212 is a wasteful number, since it uses less digits than its factorization.

20015256163212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15026468638 (or 15026468633 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 20015256163212 in words is "twenty trillion, fifteen billion, two hundred fifty-six million, one hundred sixty-three thousand, two hundred twelve".