20155115112 has 32 divisors (see below), whose sum is σ = 54968496480. Its totient is φ = 6107610560.

The previous prime is 20155115083. The next prime is 20155115137. The reversal of 20155115112 is 21151155102.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 38172303 + ... + 38172830.

It is an arithmetic number, because the mean of its divisors is an integer number (1717765515).

Almost surely, 2^20155115112 is an apocalyptic number.

20155115112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20155115112 is an abundant number, since it is smaller than the sum of its proper divisors (34813381368).

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

20155115112 is a wasteful number, since it uses less digits than its factorization.

20155115112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76345153 (or 76345149 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 24.

The spelling of 20155115112 in words is "twenty billion, one hundred fifty-five million, one hundred fifteen thousand, one hundred twelve".