20730764 has 6 divisors (see below), whose sum is σ = 36278844. Its totient is φ = 10365380.

The previous prime is 20730757. The next prime is 20730781. The reversal of 20730764 is 46703702.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2591342 + ... + 2591349.

It is an arithmetic number, because the mean of its divisors is an integer number (6046474).

Almost surely, 2^20730764 is an apocalyptic number.

It is an amenable number.

20730764 is a deficient number, since it is larger than the sum of its proper divisors (15548080).

20730764 is a wasteful number, since it uses less digits than its factorization.

20730764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5182695 (or 5182693 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 20730764 is about 4553.1048746981. The cubic root of 20730764 is about 274.7082923319.

The spelling of 20730764 in words is "twenty million, seven hundred thirty thousand, seven hundred sixty-four".