20602625 has 8 divisors (see below), whose sum is σ = 25712232. Its totient is φ = 16482000.

The previous prime is 20602619. The next prime is 20602627. The reversal of 20602625 is 52620602.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2768896 + 17833729 = 1664^2 + 4223^2 .

It is not a de Polignac number, because 20602625 - 2⁴ = 20602609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20602625.

It is not an unprimeable number, because it can be changed into a prime (20602627) 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, 82286 + ... + 82535.

It is an arithmetic number, because the mean of its divisors is an integer number (3214029).

Almost surely, 2^20602625 is an apocalyptic number.

20602625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20602625 is a deficient number, since it is larger than the sum of its proper divisors (5109607).

20602625 is an equidigital number, since it uses as much as digits as its factorization.

20602625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164836 (or 164826 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20602625 is about 4539.0114562534. The cubic root of 20602625 is about 274.1411220040.

The spelling of 20602625 in words is "twenty million, six hundred two thousand, six hundred twenty-five".