20426632663 has 8 divisors (see below), whose sum is σ = 20754092160. Its totient is φ = 20101702200.

The previous prime is 20426632631. The next prime is 20426632669. The reversal of 20426632663 is 36623662402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20426632663 - 2⁵ = 20426632631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20426632669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 615973 + ... + 648286.

It is an arithmetic number, because the mean of its divisors is an integer number (2594261520).

Almost surely, 2^20426632663 is an apocalyptic number.

20426632663 is a deficient number, since it is larger than the sum of its proper divisors (327459497).

20426632663 is a wasteful number, since it uses less digits than its factorization.

20426632663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264517.

The product of its (nonzero) digits is 373248, while the sum is 40.

The spelling of 20426632663 in words is "twenty billion, four hundred twenty-six million, six hundred thirty-two thousand, six hundred sixty-three".