20720302904 has 16 divisors (see below), whose sum is σ = 44400649200. Its totient is φ = 8880129792.

The previous prime is 20720302903. The next prime is 20720302927. The reversal of 20720302904 is 40920302702.

It is a happy number.

It is a super-3 number, since 3×20720302904³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20720302903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185002649 + ... + 185002760.

It is an arithmetic number, because the mean of its divisors is an integer number (2775040575).

Almost surely, 2^20720302904 is an apocalyptic number.

It is an amenable number.

20720302904 is an abundant number, since it is smaller than the sum of its proper divisors (23680346296).

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

20720302904 is a wasteful number, since it uses less digits than its factorization.

20720302904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370005422 (or 370005418 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The spelling of 20720302904 in words is "twenty billion, seven hundred twenty million, three hundred two thousand, nine hundred four".