20151275120 has 40 divisors (see below), whose sum is σ = 46863188064. Its totient is φ = 8058536192.

The previous prime is 20151275117. The next prime is 20151275141. The reversal of 20151275120 is 2157215102.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 20151275120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323117 + ... + 380403.

Almost surely, 2^20151275120 is an apocalyptic number.

20151275120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20151275120 is an abundant number, since it is smaller than the sum of its proper divisors (26711912944).

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

20151275120 is a wasteful number, since it uses less digits than its factorization.

20151275120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61697 (or 61691 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 26.

The spelling of 20151275120 in words is "twenty billion, one hundred fifty-one million, two hundred seventy-five thousand, one hundred twenty".