20879632 has 20 divisors (see below), whose sum is σ = 42584080. Its totient is φ = 9890208.

The previous prime is 20879627. The next prime is 20879633. The reversal of 20879632 is 23697802.

It is a junction number, because it is equal to n+sod(n) for n = 20879591 and 20879600.

It is not an unprimeable number, because it can be changed into a prime (20879633) by changing a digit.

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, 34038 + ... + 34645.

It is an arithmetic number, because the mean of its divisors is an integer number (2129204).

Almost surely, 2^20879632 is an apocalyptic number.

It is an amenable number.

20879632 is an abundant number, since it is smaller than the sum of its proper divisors (21704448).

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

20879632 is a wasteful number, since it uses less digits than its factorization.

20879632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68710 (or 68704 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 20879632 is about 4569.4235960348. The cubic root of 20879632 is about 275.3642863709.

The spelling of 20879632 in words is "twenty million, eight hundred seventy-nine thousand, six hundred thirty-two".