20788525 has 6 divisors (see below), whose sum is σ = 25777802. Its totient is φ = 16630800.

The previous prime is 20788513. The next prime is 20788553. The reversal of 20788525 is 52588702.

It can be written as a sum of positive squares in 3 ways, for example, as 2350089 + 18438436 = 1533^2 + 4294^2 .

It is not a de Polignac number, because 20788525 - 2⁹ = 20788013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 415746 + ... + 415795.

Almost surely, 2^20788525 is an apocalyptic number.

20788525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20788525 is a deficient number, since it is larger than the sum of its proper divisors (4989277).

20788525 is an equidigital number, since it uses as much as digits as its factorization.

20788525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831551 (or 831546 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 20788525 is about 4559.4434967439. The cubic root of 20788525 is about 274.9631906655.

The spelling of 20788525 in words is "twenty million, seven hundred eighty-eight thousand, five hundred twenty-five".