20100925 has 24 divisors (see below), whose sum is σ = 27109376. Its totient is φ = 14696640.

The previous prime is 20100911. The next prime is 20100931. The reversal of 20100925 is 52900102.

It is not a de Polignac number, because 20100925 - 2⁵ = 20100893 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, 41032 + ... + 41518.

Almost surely, 2^20100925 is an apocalyptic number.

20100925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20100925 is a deficient number, since it is larger than the sum of its proper divisors (7008451).

20100925 is a wasteful number, since it uses less digits than its factorization.

20100925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637 (or 632 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 20100925 is about 4483.4055136693. The cubic root of 20100925 is about 271.8975834502.

It can be divided in two parts, 20100 and 925, that added together give a square (21025 = 145²).

The spelling of 20100925 in words is "twenty million, one hundred thousand, nine hundred twenty-five".