21876180612 has 48 divisors (see below), whose sum is σ = 59968276032. Its totient is φ = 6119210880.

The previous prime is 21876180587. The next prime is 21876180629. The reversal of 21876180612 is 21608167812.

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, 6372463 + ... + 6375894.

It is an arithmetic number, because the mean of its divisors is an integer number (1249339084).

Almost surely, 2^21876180612 is an apocalyptic number.

21876180612 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21876180612 is an abundant number, since it is smaller than the sum of its proper divisors (38092095420).

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

21876180612 is a wasteful number, since it uses less digits than its factorization.

21876180612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12748388 (or 12748386 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 42.

The spelling of 21876180612 in words is "twenty-one billion, eight hundred seventy-six million, one hundred eighty thousand, six hundred twelve".