20312732 has 12 divisors (see below), whose sum is σ = 38778936. Its totient is φ = 9233040.

The previous prime is 20312713. The next prime is 20312779. The reversal of 20312732 is 23721302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230783 + ... + 230870.

It is an arithmetic number, because the mean of its divisors is an integer number (3231578).

Almost surely, 2^20312732 is an apocalyptic number.

20312732 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20312732 is a deficient number, since it is larger than the sum of its proper divisors (18466204).

20312732 is a wasteful number, since it uses less digits than its factorization.

20312732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461668 (or 461666 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 20312732 is about 4506.9648323456. The cubic root of 20312732 is about 272.8492595435.

The spelling of 20312732 in words is "twenty million, three hundred twelve thousand, seven hundred thirty-two".