20531300025 has 24 divisors (see below), whose sum is σ = 34014278304. Its totient is φ = 10927705600.

The previous prime is 20531300017. The next prime is 20531300077. The reversal of 20531300025 is 52000313502.

It is not a de Polignac number, because 20531300025 - 2³ = 20531300017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20531299974 and 20531300010.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 241944 + ... + 315593.

It is an arithmetic number, because the mean of its divisors is an integer number (1417261596).

Almost surely, 2^20531300025 is an apocalyptic number.

20531300025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20531300025 is a deficient number, since it is larger than the sum of its proper divisors (13482978279).

20531300025 is a wasteful number, since it uses less digits than its factorization.

20531300025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558041 (or 558036 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

Adding to 20531300025 its reverse (52000313502), we get a palindrome (72531613527).

The spelling of 20531300025 in words is "twenty billion, five hundred thirty-one million, three hundred thousand, twenty-five".