20587590396025 has 9 divisors (see below), whose sum is σ = 25528640222703. Its totient is φ = 16470054167400.

The previous prime is 20587590396017. The next prime is 20587590396049. The reversal of 20587590396025 is 52069309578502.

The square root of 20587590396025 is 4537355.

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

It can be written as a sum of positive squares in only one way, i.e., 7411532542569 + 13176057853456 = 2722413^2 + 3629884^2 .

It is not a de Polignac number, because 20587590396025 - 2³ = 20587590396017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 22233040 + ... + 23140510.

Almost surely, 2^{20587590396025} is an apocalyptic number.

20587590396025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20587590396025 is the 4537355-th square number.

20587590396025 is the 2268678-th centered octagonal number.

It is an amenable number.

20587590396025 is a deficient number, since it is larger than the sum of its proper divisors (4941049826678).

20587590396025 is an frugal number, since it uses more digits than its factorization.

20587590396025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1814952 (or 907476 counting only the distinct ones).

The product of its (nonzero) digits is 40824000, while the sum is 61.

The spelling of 20587590396025 in words is "twenty trillion, five hundred eighty-seven billion, five hundred ninety million, three hundred ninety-six thousand, twenty-five".