20958925 has 12 divisors (see below), whose sum is σ = 27988660. Its totient is φ = 15477120.

The previous prime is 20958907. The next prime is 20958941. The reversal of 20958925 is 52985902.

It can be written as a sum of positive squares in 6 ways, for example, as 1572516 + 19386409 = 1254^2 + 4403^2 .

It is not a de Polignac number, because 20958925 - 2¹⁷ = 20827853 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31920 + ... + 32569.

Almost surely, 2^20958925 is an apocalyptic number.

20958925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20958925 is a deficient number, since it is larger than the sum of its proper divisors (7029735).

20958925 is a wasteful number, since it uses less digits than its factorization.

20958925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64512 (or 64507 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 20958925 is about 4578.0918514158. The cubic root of 20958925 is about 275.7124227562.

The spelling of 20958925 in words is "twenty million, nine hundred fifty-eight thousand, nine hundred twenty-five".