21919667675490 has 96 divisors (see below), whose sum is σ = 62415325103040. Its totient is φ = 5304159462528.

The previous prime is 21919667675467. The next prime is 21919667675531. The reversal of 21919667675490 is 9457676691912.

It is a happy number.

21919667675490 is a `hidden beast` number, since 2 + 1 + 9 + 1 + 9 + 6 + 6 + 76 + 7 + 549 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 158700112 + ... + 158838171.

It is an arithmetic number, because the mean of its divisors is an integer number (650159636490).

Almost surely, 2^{21919667675490} is an apocalyptic number.

21919667675490 is an abundant number, since it is smaller than the sum of its proper divisors (40495657427550).

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

21919667675490 is a wasteful number, since it uses less digits than its factorization.

21919667675490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317538368 (or 317538365 counting only the distinct ones).

The product of its (nonzero) digits is 308629440, while the sum is 72.

The spelling of 21919667675490 in words is "twenty-one trillion, nine hundred nineteen billion, six hundred sixty-seven million, six hundred seventy-five thousand, four hundred ninety".