20752736 has 24 divisors (see below), whose sum is σ = 41094144. Its totient is φ = 10316160.

The previous prime is 20752729. The next prime is 20752741. The reversal of 20752736 is 63725702.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4001 + ... + 7583.

It is an arithmetic number, because the mean of its divisors is an integer number (1712256).

Almost surely, 2^20752736 is an apocalyptic number.

It is an amenable number.

20752736 is a deficient number, since it is larger than the sum of its proper divisors (20341408).

20752736 is a wasteful number, since it uses less digits than its factorization.

20752736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3774 (or 3766 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 20752736 is about 4555.5170946886. The cubic root of 20752736 is about 274.8053101332.

The spelling of 20752736 in words is "twenty million, seven hundred fifty-two thousand, seven hundred thirty-six".