20807290984 has 32 divisors (see below), whose sum is σ = 40048715520. Its totient is φ = 10129182336.

The previous prime is 20807290969. The next prime is 20807291017. The reversal of 20807290984 is 48909270802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11049 + ... + 204295.

It is an arithmetic number, because the mean of its divisors is an integer number (1251522360).

Almost surely, 2^20807290984 is an apocalyptic number.

It is an amenable number.

20807290984 is a deficient number, since it is larger than the sum of its proper divisors (19241424536).

20807290984 is a wasteful number, since it uses less digits than its factorization.

20807290984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193609 (or 193605 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 49.

The spelling of 20807290984 in words is "twenty billion, eight hundred seven million, two hundred ninety thousand, nine hundred eighty-four".