20590815025 has 27 divisors (see below), whose sum is σ = 28075531393. Its totient is φ = 14969398400.

The previous prime is 20590814941. The next prime is 20590815043. The reversal of 20590815025 is 52051809502.

The square root of 20590815025 is 143495.

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

It can be written as a sum of positive squares in 4 ways, for example, as 530058529 + 20060756496 = 23023^2 + 141636^2 .

It is not a de Polignac number, because 20590815025 - 2¹⁵ = 20590782257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 7890921 + ... + 7893529.

Almost surely, 2^20590815025 is an apocalyptic number.

20590815025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20590815025 is the 143495-th square number.

20590815025 is the 71748-th centered octagonal number.

It is an amenable number.

20590815025 is a deficient number, since it is larger than the sum of its proper divisors (7484716368).

20590815025 is an frugal number, since it uses more digits than its factorization.

20590815025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5250 (or 2625 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 37.

The spelling of 20590815025 in words is "twenty billion, five hundred ninety million, eight hundred fifteen thousand, twenty-five".