20604523631 has 2 divisors, whose sum is σ = 20604523632. Its totient is φ = 20604523630.

The previous prime is 20604523579. The next prime is 20604523661. The reversal of 20604523631 is 13632540602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20604523631 - 2¹⁴ = 20604507247 is a prime.

It is a super-2 number, since 2×20604523631² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20604523661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10302261815 + 10302261816.

It is an arithmetic number, because the mean of its divisors is an integer number (10302261816).

Almost surely, 2^20604523631 is an apocalyptic number.

20604523631 is a deficient number, since it is larger than the sum of its proper divisors (1).

20604523631 is an equidigital number, since it uses as much as digits as its factorization.

20604523631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 32.

The spelling of 20604523631 in words is "twenty billion, six hundred four million, five hundred twenty-three thousand, six hundred thirty-one".