20490996584 has 16 divisors (see below), whose sum is σ = 38422144800. Its totient is φ = 10245091312.

The previous prime is 20490996569. The next prime is 20490996599. The reversal of 20490996584 is 48569909402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20490996569) and next prime (20490996599).

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, 337637 + ... + 393675.

It is an arithmetic number, because the mean of its divisors is an integer number (2401384050).

Almost surely, 2^20490996584 is an apocalyptic number.

It is an amenable number.

20490996584 is a deficient number, since it is larger than the sum of its proper divisors (17931148216).

20490996584 is a wasteful number, since it uses less digits than its factorization.

20490996584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101752 (or 101748 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 56.

The spelling of 20490996584 in words is "twenty billion, four hundred ninety million, nine hundred ninety-six thousand, five hundred eighty-four".