20780365304 has 16 divisors (see below), whose sum is σ = 39792189600. Its totient is φ = 10169114752.

The previous prime is 20780365267. The next prime is 20780365337. The reversal of 20780365304 is 40356308702.

It is a congruent number.

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, 27633089 + ... + 27633840.

It is an arithmetic number, because the mean of its divisors is an integer number (2487011850).

Almost surely, 2^20780365304 is an apocalyptic number.

It is an amenable number.

20780365304 is a deficient number, since it is larger than the sum of its proper divisors (19011824296).

20780365304 is a wasteful number, since it uses less digits than its factorization.

20780365304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55266982 (or 55266978 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 38.

The spelling of 20780365304 in words is "twenty billion, seven hundred eighty million, three hundred sixty-five thousand, three hundred four".