204420464523631 has 4 divisors (see below), whose sum is σ = 204425418651232. Its totient is φ = 204415510396032.

The previous prime is 204420464523601. The next prime is 204420464523637. The reversal of 204420464523631 is 136325464024402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 204420464523631 - 2⁵ = 204420464523599 is a prime.

It is a super-2 number, since 2×204420464523631² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204420464523637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2477001906 + ... + 2477084431.

It is an arithmetic number, because the mean of its divisors is an integer number (51106354662808).

Almost surely, 2^{204420464523631} is an apocalyptic number.

204420464523631 is a deficient number, since it is larger than the sum of its proper divisors (4954127601).

204420464523631 is an equidigital number, since it uses as much as digits as its factorization.

204420464523631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4954127600.

The product of its (nonzero) digits is 3317760, while the sum is 46.

The spelling of 204420464523631 in words is "two hundred four trillion, four hundred twenty billion, four hundred sixty-four million, five hundred twenty-three thousand, six hundred thirty-one".