21375250236475 has 24 divisors (see below), whose sum is σ = 27129255194912. Its totient is φ = 16702203628800.

The previous prime is 21375250236449. The next prime is 21375250236497. The reversal of 21375250236475 is 57463205257312.

It is not a de Polignac number, because 21375250236475 - 2²³ = 21375241847867 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56668656 + ... + 57044605.

Almost surely, 2^{21375250236475} is an apocalyptic number.

21375250236475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21375250236475 is a deficient number, since it is larger than the sum of its proper divisors (5754004958437).

21375250236475 is a wasteful number, since it uses less digits than its factorization.

21375250236475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113713447 (or 113713442 counting only the distinct ones).

The product of its (nonzero) digits is 10584000, while the sum is 52.

The spelling of 21375250236475 in words is "twenty-one trillion, three hundred seventy-five billion, two hundred fifty million, two hundred thirty-six thousand, four hundred seventy-five".