21930683775 has 288 divisors, whose sum is σ = 51296716800. Its totient is φ = 8117222400.

The previous prime is 21930683713. The next prime is 21930683821. The reversal of 21930683775 is 57738603912.

It is not a de Polignac number, because 21930683775 - 2⁷ = 21930683647 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 15239506 + ... + 15240944.

It is an arithmetic number, because the mean of its divisors is an integer number (178113600).

Almost surely, 2^21930683775 is an apocalyptic number.

21930683775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21930683775 is an abundant number, since it is smaller than the sum of its proper divisors (29366033025).

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

21930683775 is a wasteful number, since it uses less digits than its factorization.

21930683775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519 (or 1507 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 51.

The spelling of 21930683775 in words is "twenty-one billion, nine hundred thirty million, six hundred eighty-three thousand, seven hundred seventy-five".