20118891876 has 48 divisors (see below), whose sum is σ = 49983272640. Its totient is φ = 6276536320.

The previous prime is 20118891851. The next prime is 20118891899. The reversal of 20118891876 is 67819881102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

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, 238965 + ... + 311996.

It is an arithmetic number, because the mean of its divisors is an integer number (1041318180).

Almost surely, 2^20118891876 is an apocalyptic number.

It is an amenable number.

20118891876 is an abundant number, since it is smaller than the sum of its proper divisors (29864380764).

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

20118891876 is a wasteful number, since it uses less digits than its factorization.

20118891876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551164 (or 551162 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 51.

The spelling of 20118891876 in words is "twenty billion, one hundred eighteen million, eight hundred ninety-one thousand, eight hundred seventy-six".