20745732 has 48 divisors (see below), whose sum is σ = 55544832. Its totient is φ = 5903520.

The previous prime is 20745691. The next prime is 20745761. The reversal of 20745732 is 23754702.

It is a self number, because there is not a number n which added to its sum of digits gives 20745732.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40993 + ... + 41495.

It is an arithmetic number, because the mean of its divisors is an integer number (1157184).

Almost surely, 2^20745732 is an apocalyptic number.

It is an amenable number.

20745732 is an abundant number, since it is smaller than the sum of its proper divisors (34799100).

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

20745732 is a wasteful number, since it uses less digits than its factorization.

20745732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008 (or 1006 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 30.

The square root of 20745732 is about 4554.7482916183. The cubic root of 20745732 is about 274.7743912708.

The spelling of 20745732 in words is "twenty million, seven hundred forty-five thousand, seven hundred thirty-two".