20925069025 has 27 divisors (see below), whose sum is σ = 30190649241. Its totient is φ = 14345147040.

The previous prime is 20925069023. The next prime is 20925069043. The reversal of 20925069025 is 52096052902.

The square root of 20925069025 is 144655.

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 244328161 + 20680740864 = 15631^2 + 143808^2 .

It is not a de Polignac number, because 20925069025 - 2¹ = 20925069023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20925069023) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 5060859 + ... + 5064991.

Almost surely, 2^20925069025 is an apocalyptic number.

20925069025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20925069025 is the 144655-th square number.

20925069025 is the 72328-th centered octagonal number.

It is an amenable number.

20925069025 is a deficient number, since it is larger than the sum of its proper divisors (9265580216).

20925069025 is an frugal number, since it uses more digits than its factorization.

20925069025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8290 (or 4145 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 20925069025 in words is "twenty billion, nine hundred twenty-five million, sixty-nine thousand, twenty-five".