20444022664 has 16 divisors (see below), whose sum is σ = 41281199820. Its totient is φ = 9435702720.

The previous prime is 20444022637. The next prime is 20444022679. The reversal of 20444022664 is 46622044402.

It can be written as a sum of positive squares in 2 ways, for example, as 20265800164 + 178222500 = 142358^2 + 13350^2 .

It is a super-2 number, since 2×20444022664² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98288467 + ... + 98288674.

Almost surely, 2^20444022664 is an apocalyptic number.

It is an amenable number.

20444022664 is an abundant number, since it is smaller than the sum of its proper divisors (20837177156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20444022664 is a wasteful number, since it uses less digits than its factorization.

20444022664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196577160 (or 196577156 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 34.

The spelling of 20444022664 in words is "twenty billion, four hundred forty-four million, twenty-two thousand, six hundred sixty-four".