20631875 has 20 divisors (see below), whose sum is σ = 28134744. Its totient is φ = 15000000.

The previous prime is 20631869. The next prime is 20631899. The reversal of 20631875 is 57813602.

It is a happy number.

It is not a de Polignac number, because 20631875 - 2⁸ = 20631619 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5375 + ... + 8375.

Almost surely, 2^20631875 is an apocalyptic number.

20631875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20631875 is a deficient number, since it is larger than the sum of its proper divisors (7502869).

20631875 is an equidigital number, since it uses as much as digits as its factorization.

20631875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3032 (or 3017 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 20631875 is about 4542.2323806692. The cubic root of 20631875 is about 274.2707953841.

The spelling of 20631875 in words is "twenty million, six hundred thirty-one thousand, eight hundred seventy-five".