20531700625 has 20 divisors (see below), whose sum is σ = 25785496000. Its totient is φ = 16342722000.

The previous prime is 20531700601. The next prime is 20531700641. The reversal of 20531700625 is 52600713502.

It is not a de Polignac number, because 20531700625 - 2¹⁵ = 20531667857 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 41836 + ... + 206914.

It is an arithmetic number, because the mean of its divisors is an integer number (1289274800).

Almost surely, 2^20531700625 is an apocalyptic number.

20531700625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20531700625 is a deficient number, since it is larger than the sum of its proper divisors (5253795375).

20531700625 is an equidigital number, since it uses as much as digits as its factorization.

20531700625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165298 (or 165283 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The spelling of 20531700625 in words is "twenty billion, five hundred thirty-one million, seven hundred thousand, six hundred twenty-five".