21096375 has 32 divisors (see below), whose sum is σ = 35515584. Its totient is φ = 11120000.

The previous prime is 21096367. The next prime is 21096379. The reversal of 21096375 is 57369012.

It is not a de Polignac number, because 21096375 - 2³ = 21096367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21096379) 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, 37597 + ... + 38153.

It is an arithmetic number, because the mean of its divisors is an integer number (1109862).

Almost surely, 2^21096375 is an apocalyptic number.

21096375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21096375 is a deficient number, since it is larger than the sum of its proper divisors (14419209).

21096375 is a wasteful number, since it uses less digits than its factorization.

21096375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676 (or 666 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 21096375 is about 4593.0790326316. The cubic root of 21096375 is about 276.3138233540.

The spelling of 21096375 in words is "twenty-one million, ninety-six thousand, three hundred seventy-five".