21630267315375 has 32 divisors (see below), whose sum is σ = 36020053555200. Its totient is φ = 11527396176800.

The previous prime is 21630267315367. The next prime is 21630267315379. The reversal of 21630267315375 is 57351376203612.

It is not a de Polignac number, because 21630267315375 - 2³ = 21630267315367 is a prime.

It is a super-2 number, since 2×21630267315375² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21630267315379) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21370695 + ... + 22359944.

It is an arithmetic number, because the mean of its divisors is an integer number (1125626673600).

Almost surely, 2^{21630267315375} is an apocalyptic number.

21630267315375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21630267315375 is a deficient number, since it is larger than the sum of its proper divisors (14389786239825).

21630267315375 is a wasteful number, since it uses less digits than its factorization.

21630267315375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43731976 (or 43731966 counting only the distinct ones).

The product of its (nonzero) digits is 4762800, while the sum is 51.

The spelling of 21630267315375 in words is "twenty-one trillion, six hundred thirty billion, two hundred sixty-seven million, three hundred fifteen thousand, three hundred seventy-five".