20396625 has 32 divisors (see below), whose sum is σ = 34320000. Its totient is φ = 10756800.

The previous prime is 20396591. The next prime is 20396681. The reversal of 20396625 is 52669302.

It is not a de Polignac number, because 20396625 - 2⁹ = 20396113 is a prime.

It is a super-2 number, since 2×20396625² = 832044622781250, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40626 + ... + 41124.

It is an arithmetic number, because the mean of its divisors is an integer number (1072500).

Almost surely, 2^20396625 is an apocalyptic number.

20396625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20396625 is a deficient number, since it is larger than the sum of its proper divisors (13923375).

20396625 is a wasteful number, since it uses less digits than its factorization.

20396625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626 (or 616 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 20396625 is about 4516.2622820204. The cubic root of 20396625 is about 273.2243724268.

The spelling of 20396625 in words is "twenty million, three hundred ninety-six thousand, six hundred twenty-five".