20906732 has 36 divisors (see below), whose sum is σ = 46434024. Its totient is φ = 8144640.

The previous prime is 20906687. The next prime is 20906737. The reversal of 20906732 is 23760902.

It is a junction number, because it is equal to n+sod(n) for n = 20906695 and 20906704.

It is not an unprimeable number, because it can be changed into a prime (20906737) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2693 + ... + 7004.

It is an arithmetic number, because the mean of its divisors is an integer number (1289834).

Almost surely, 2^20906732 is an apocalyptic number.

20906732 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20906732 is an abundant number, since it is smaller than the sum of its proper divisors (25527292).

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

20906732 is a wasteful number, since it uses less digits than its factorization.

20906732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9726 (or 9717 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 20906732 is about 4572.3879975348. The cubic root of 20906732 is about 275.4833680670.

The spelling of 20906732 in words is "twenty million, nine hundred six thousand, seven hundred thirty-two".