20536625 has 16 divisors (see below), whose sum is σ = 26981760. Its totient is φ = 15562800.

The previous prime is 20536619. The next prime is 20536627. The reversal of 20536625 is 52663502.

It is a happy number.

It is not a de Polignac number, because 20536625 - 2¹⁰ = 20535601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20536627) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1949 + ... + 6698.

It is an arithmetic number, because the mean of its divisors is an integer number (1686360).

Almost surely, 2^20536625 is an apocalyptic number.

20536625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20536625 is a deficient number, since it is larger than the sum of its proper divisors (6445135).

20536625 is an equidigital number, since it uses as much as digits as its factorization.

20536625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8681 (or 8671 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 20536625 is about 4531.7353188376. The cubic root of 20536625 is about 273.8480740873.

The spelling of 20536625 in words is "twenty million, five hundred thirty-six thousand, six hundred twenty-five".