20356625 has 8 divisors (see below), whose sum is σ = 25405224. Its totient is φ = 16285200.

The previous prime is 20356607. The next prime is 20356627. The reversal of 20356625 is 52665302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3125824 + 17230801 = 1768^2 + 4151^2 .

It is not a de Polignac number, because 20356625 - 2¹² = 20352529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20356627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81302 + ... + 81551.

It is an arithmetic number, because the mean of its divisors is an integer number (3175653).

Almost surely, 2^20356625 is an apocalyptic number.

20356625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20356625 is a deficient number, since it is larger than the sum of its proper divisors (5048599).

20356625 is an equidigital number, since it uses as much as digits as its factorization.

20356625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162868 (or 162858 counting only the distinct ones).

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

The square root of 20356625 is about 4511.8316679593. The cubic root of 20356625 is about 273.0456479729.

The spelling of 20356625 in words is "twenty million, three hundred fifty-six thousand, six hundred twenty-five".