20879012 has 24 divisors (see below), whose sum is σ = 45554880. Its totient is φ = 8134560.

The previous prime is 20878999. The next prime is 20879021. The reversal of 20879012 is 21097802.

It is a happy number.

It is a super-2 number, since 2×20879012² = 871866284192288, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 33587 + ... + 34202.

It is an arithmetic number, because the mean of its divisors is an integer number (1898120).

Almost surely, 2^20879012 is an apocalyptic number.

20879012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20879012 is an abundant number, since it is smaller than the sum of its proper divisors (24675868).

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

20879012 is a wasteful number, since it uses less digits than its factorization.

20879012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67811 (or 67809 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 20879012 is about 4569.3557532764. The cubic root of 20879012 is about 275.3615607873.

It can be divided in two parts, 208790 and 12, that added together give a palindrome (208802).

The spelling of 20879012 in words is "twenty million, eight hundred seventy-nine thousand, twelve".