20636629325 has 24 divisors (see below), whose sum is σ = 27602769768. Its totient is φ = 15214510080.

The previous prime is 20636629283. The next prime is 20636629333. The reversal of 20636629325 is 52392663602.

It can be written as a sum of positive squares in 12 ways, for example, as 19007861161 + 1628768164 = 137869^2 + 40358^2 .

It is not a de Polignac number, because 20636629325 - 2³⁰ = 19562887501 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

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, 149069 + ... + 251981.

It is an arithmetic number, because the mean of its divisors is an integer number (1150115407).

Almost surely, 2^20636629325 is an apocalyptic number.

20636629325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20636629325 is a deficient number, since it is larger than the sum of its proper divisors (6966140443).

20636629325 is a wasteful number, since it uses less digits than its factorization.

20636629325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103553 (or 103548 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 44.

The spelling of 20636629325 in words is "twenty billion, six hundred thirty-six million, six hundred twenty-nine thousand, three hundred twenty-five".