21362975 has 24 divisors (see below), whose sum is σ = 28203552. Its totient is φ = 16016000.

The previous prime is 21362969. The next prime is 21362983. The reversal of 21362975 is 57926312.

It is a de Polignac number, because none of the positive numbers 2^k-21362975 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30125 + ... + 30825.

It is an arithmetic number, because the mean of its divisors is an integer number (1175148).

Almost surely, 2^21362975 is an apocalyptic number.

21362975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21362975 is a deficient number, since it is larger than the sum of its proper divisors (6840577).

21362975 is a wasteful number, since it uses less digits than its factorization.

21362975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787 (or 782 counting only the distinct ones).

The product of its digits is 22680, while the sum is 35.

The square root of 21362975 is about 4622.0098442128. The cubic root of 21362975 is about 277.4729026919.

The spelling of 21362975 in words is "twenty-one million, three hundred sixty-two thousand, nine hundred seventy-five".