20490580964 has 24 divisors (see below), whose sum is σ = 43391819520. Its totient is φ = 8265108096.

The previous prime is 20490580933. The next prime is 20490580967. The reversal of 20490580964 is 46908509402.

It is not an unprimeable number, because it can be changed into a prime (20490580967) 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, 21523244 + ... + 21524195.

It is an arithmetic number, because the mean of its divisors is an integer number (1807992480).

Almost surely, 2^20490580964 is an apocalyptic number.

It is an amenable number.

20490580964 is an abundant number, since it is smaller than the sum of its proper divisors (22901238556).

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

20490580964 is a wasteful number, since it uses less digits than its factorization.

20490580964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43047467 (or 43047465 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 20490580964 in words is "twenty billion, four hundred ninety million, five hundred eighty thousand, nine hundred sixty-four".