20665675 has 12 divisors (see below), whose sum is σ = 25772656. Its totient is φ = 16437600.

The previous prime is 20665669. The next prime is 20665739. The reversal of 20665675 is 57656602.

It is not a de Polignac number, because 20665675 - 2¹⁷ = 20534603 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2242 + ... + 6808.

Almost surely, 2^20665675 is an apocalyptic number.

20665675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20665675 is a deficient number, since it is larger than the sum of its proper divisors (5106981).

20665675 is a wasteful number, since it uses less digits than its factorization.

20665675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4758 (or 4753 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 20665675 is about 4545.9514955617. The cubic root of 20665675 is about 274.4204876301.

The spelling of 20665675 in words is "twenty million, six hundred sixty-five thousand, six hundred seventy-five".