21751170875 has 64 divisors (see below), whose sum is σ = 32427682560. Its totient is φ = 14250700800.

The previous prime is 21751170851. The next prime is 21751170893. The reversal of 21751170875 is 57807115712.

It is not a de Polignac number, because 21751170875 - 2¹⁸ = 21750908731 is a prime.

It is a super-2 number, since 2×21751170875² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2456957 + ... + 2465793.

It is an arithmetic number, because the mean of its divisors is an integer number (506682540).

Almost surely, 2^21751170875 is an apocalyptic number.

21751170875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21751170875 is a deficient number, since it is larger than the sum of its proper divisors (10676511685).

21751170875 is an equidigital number, since it uses as much as digits as its factorization.

21751170875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8985 (or 8975 counting only the distinct ones).

The product of its (nonzero) digits is 137200, while the sum is 44.

The spelling of 21751170875 in words is "twenty-one billion, seven hundred fifty-one million, one hundred seventy thousand, eight hundred seventy-five".