20504625 has 16 divisors (see below), whose sum is σ = 34120320. Its totient is φ = 10935600.

The previous prime is 20504611. The next prime is 20504639. The reversal of 20504625 is 52640502.

It is an interprime number because it is at equal distance from previous prime (20504611) and next prime (20504639).

It is not a de Polignac number, because 20504625 - 2¹⁰ = 20503601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20504595 and 20504604.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26965 + ... + 27714.

It is an arithmetic number, because the mean of its divisors is an integer number (2132520).

Almost surely, 2^20504625 is an apocalyptic number.

20504625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20504625 is a deficient number, since it is larger than the sum of its proper divisors (13615695).

20504625 is an equidigital number, since it uses as much as digits as its factorization.

20504625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54697 (or 54687 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 20504625 is about 4528.2032860727. The cubic root of 20504625 is about 273.7057642081.

The spelling of 20504625 in words is "twenty million, five hundred four thousand, six hundred twenty-five".