20740764 has 24 divisors (see below), whose sum is σ = 52795008. Its totient is φ = 6285040.

The previous prime is 20740747. The next prime is 20740777. The reversal of 20740764 is 46704702.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78432 + ... + 78695.

It is an arithmetic number, because the mean of its divisors is an integer number (2199792).

Almost surely, 2^20740764 is an apocalyptic number.

It is an amenable number.

20740764 is an abundant number, since it is smaller than the sum of its proper divisors (32054244).

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

20740764 is a wasteful number, since it uses less digits than its factorization.

20740764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157145 (or 157143 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 20740764 is about 4554.2028940310. The cubic root of 20740764 is about 274.7524560256.

The spelling of 20740764 in words is "twenty million, seven hundred forty thousand, seven hundred sixty-four".