20708732 has 12 divisors (see below), whose sum is σ = 39534936. Its totient is φ = 9413040.

The previous prime is 20708729. The next prime is 20708741. The reversal of 20708732 is 23780702.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 20708695 and 20708704.

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, 235283 + ... + 235370.

It is an arithmetic number, because the mean of its divisors is an integer number (3294578).

Almost surely, 2^20708732 is an apocalyptic number.

20708732 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20708732 is a deficient number, since it is larger than the sum of its proper divisors (18826204).

20708732 is a wasteful number, since it uses less digits than its factorization.

20708732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470668 (or 470666 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 20708732 is about 4550.6847836342. The cubic root of 20708732 is about 274.6109407428.

The spelling of 20708732 in words is "twenty million, seven hundred eight thousand, seven hundred thirty-two".