20290578025 has 27 divisors (see below), whose sum is σ = 26026441623. Its totient is φ = 15691741200.

The previous prime is 20290578017. The next prime is 20290578043. The reversal of 20290578025 is 52087509202.

The square root of 20290578025 is 142445.

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., 7304608089 + 12985969936 = 85467^2 + 113956^2 .

It is not a de Polignac number, because 20290578025 - 2³ = 20290578017 is a prime.

It is a super-2 number, since 2×20290578025² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 22078516 + ... + 22079434.

Almost surely, 2^20290578025 is an apocalyptic number.

20290578025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20290578025 is the 142445-th square number.

20290578025 is the 71223-rd centered octagonal number.

It is an amenable number.

20290578025 is a deficient number, since it is larger than the sum of its proper divisors (5735863598).

20290578025 is an frugal number, since it uses more digits than its factorization.

20290578025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1910 (or 955 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 20290578025 in words is "twenty billion, two hundred ninety million, five hundred seventy-eight thousand, twenty-five".