21485854676 has 96 divisors (see below), whose sum is σ = 45827873280. Its totient is φ = 8683084800.

The previous prime is 21485854613. The next prime is 21485854703. The reversal of 21485854676 is 67645858412.

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, 1846910 + ... + 1858506.

It is an arithmetic number, because the mean of its divisors is an integer number (477373680).

Almost surely, 2^21485854676 is an apocalyptic number.

21485854676 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21485854676 is an abundant number, since it is smaller than the sum of its proper divisors (24342018604).

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

21485854676 is a wasteful number, since it uses less digits than its factorization.

21485854676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11745 (or 11743 counting only the distinct ones).

The product of its digits is 12902400, while the sum is 56.

The spelling of 21485854676 in words is "twenty-one billion, four hundred eighty-five million, eight hundred fifty-four thousand, six hundred seventy-six".