20744463408 has 40 divisors (see below), whose sum is σ = 53635387056. Its totient is φ = 6908947200.

The previous prime is 20744463391. The next prime is 20744463449. The reversal of 20744463408 is 80436444702.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20744463408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126283 + ... + 239658.

Almost surely, 2^20744463408 is an apocalyptic number.

It is an amenable number.

20744463408 is an abundant number, since it is smaller than the sum of its proper divisors (32890923648).

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

20744463408 is a wasteful number, since it uses less digits than its factorization.

20744463408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367133 (or 367127 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 42.

The spelling of 20744463408 in words is "twenty billion, seven hundred forty-four million, four hundred sixty-three thousand, four hundred eight".