20475625 has 15 divisors (see below), whose sum is σ = 25728483. Its totient is φ = 16290000.

The previous prime is 20475613. The next prime is 20475641. The reversal of 20475625 is 52657402.

The square root of 20475625 is 4525.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 19829209 + 646416 = 4453^2 + 804^2 .

It is not a de Polignac number, because 20475625 - 2¹¹ = 20473577 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 113035 + ... + 113215.

Almost surely, 2^20475625 is an apocalyptic number.

20475625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20475625 is the 4525-th square number.

20475625 is the 2263-rd centered octagonal number.

It is an amenable number.

20475625 is a deficient number, since it is larger than the sum of its proper divisors (5252858).

20475625 is an frugal number, since it uses more digits than its factorization.

20475625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382 (or 186 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The cubic root of 20475625 is about 273.5766679330.

The spelling of 20475625 in words is "twenty million, four hundred seventy-five thousand, six hundred twenty-five".