20764732 has 12 divisors (see below), whose sum is σ = 36388296. Its totient is φ = 10368080.

The previous prime is 20764717. The next prime is 20764753. The reversal of 20764732 is 23746702.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20764694 and 20764703.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123 + ... + 6445.

It is an arithmetic number, because the mean of its divisors is an integer number (3032358).

Almost surely, 2^20764732 is an apocalyptic number.

It is an amenable number.

20764732 is a deficient number, since it is larger than the sum of its proper divisors (15623564).

20764732 is a wasteful number, since it uses less digits than its factorization.

20764732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7148 (or 7146 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 20764732 is about 4556.8335497360. The cubic root of 20764732 is about 274.8582498117.

The spelling of 20764732 in words is "twenty million, seven hundred sixty-four thousand, seven hundred thirty-two".