20887861375 has 32 divisors (see below), whose sum is σ = 27849818880. Its totient is φ = 15594400800.

The previous prime is 20887861367. The next prime is 20887861381. The reversal of 20887861375 is 57316878802.

It is a happy number.

It is not a de Polignac number, because 20887861375 - 2³ = 20887861367 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93492 + ... + 224758.

It is an arithmetic number, because the mean of its divisors is an integer number (870306840).

Almost surely, 2^20887861375 is an apocalyptic number.

20887861375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20887861375 is a deficient number, since it is larger than the sum of its proper divisors (6961957505).

20887861375 is a wasteful number, since it uses less digits than its factorization.

20887861375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131368 (or 131358 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 55.

The spelling of 20887861375 in words is "twenty billion, eight hundred eighty-seven million, eight hundred sixty-one thousand, three hundred seventy-five".