20604305764 has 27 divisors (see below), whose sum is σ = 41948570937. Its totient is φ = 8829555504.

The previous prime is 20604305759. The next prime is 20604305807. The reversal of 20604305764 is 46750340602.

The square root of 20604305764 is 143542.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2435422500 + 18168883264 = 49350^2 + 134792^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2004462 + ... + 2014714.

Almost surely, 2^20604305764 is an apocalyptic number.

20604305764 is the 143542-nd square number.

It is an amenable number.

20604305764 is an abundant number, since it is smaller than the sum of its proper divisors (21344265173).

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

20604305764 is an frugal number, since it uses more digits than its factorization.

20604305764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20524 (or 10262 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 37.

The spelling of 20604305764 in words is "twenty billion, six hundred four million, three hundred five thousand, seven hundred sixty-four".