21955846476 has 12 divisors (see below), whose sum is σ = 51230308472. Its totient is φ = 7318615488.

The previous prime is 21955846457. The next prime is 21955846541. The reversal of 21955846476 is 67464855912.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 914826925 + ... + 914826948.

Almost surely, 2^21955846476 is an apocalyptic number.

It is an amenable number.

21955846476 is an abundant number, since it is smaller than the sum of its proper divisors (29274461996).

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

21955846476 is a wasteful number, since it uses less digits than its factorization.

21955846476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1829653880 (or 1829653878 counting only the distinct ones).

The product of its digits is 14515200, while the sum is 57.

The spelling of 21955846476 in words is "twenty-one billion, nine hundred fifty-five million, eight hundred forty-six thousand, four hundred seventy-six".