21074675 has 6 divisors (see below), whose sum is σ = 26132628. Its totient is φ = 16859720.

The previous prime is 21074657. The next prime is 21074681. The reversal of 21074675 is 57647012.

It is not a de Polignac number, because 21074675 - 2⁸ = 21074419 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 421469 + ... + 421518.

It is an arithmetic number, because the mean of its divisors is an integer number (4355438).

Almost surely, 2^21074675 is an apocalyptic number.

21074675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21074675 is a deficient number, since it is larger than the sum of its proper divisors (5057953).

21074675 is an equidigital number, since it uses as much as digits as its factorization.

21074675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842997 (or 842992 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 21074675 is about 4590.7161750646. The cubic root of 21074675 is about 276.2190508792.

The spelling of 21074675 in words is "twenty-one million, seventy-four thousand, six hundred seventy-five".