20777272576 has 18 divisors (see below), whose sum is σ = 41473384442. Its totient is φ = 10388636160.

The previous prime is 20777272567. The next prime is 20777272613. The reversal of 20777272576 is 67527277702.

It can be written as a sum of positive squares in only one way, i.e., 18556978176 + 2220294400 = 136224^2 + 47120^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40580355 + ... + 40580866.

Almost surely, 2^20777272576 is an apocalyptic number.

It is an amenable number.

20777272576 is a deficient number, since it is larger than the sum of its proper divisors (20696111866).

20777272576 is an frugal number, since it uses more digits than its factorization.

20777272576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81161237 (or 81161223 counting only the distinct ones).

The product of its (nonzero) digits is 4033680, while the sum is 52.

The spelling of 20777272576 in words is "twenty billion, seven hundred seventy-seven million, two hundred seventy-two thousand, five hundred seventy-six".