20678812 has 24 divisors (see below), whose sum is σ = 45118080. Its totient is φ = 8056560.

The previous prime is 20678809. The next prime is 20678831. The reversal of 20678812 is 21887602.

It is a super-2 number, since 2×20678812² = 855226531462688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33262 + ... + 33877.

It is an arithmetic number, because the mean of its divisors is an integer number (1879920).

Almost surely, 2^20678812 is an apocalyptic number.

20678812 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20678812 is an abundant number, since it is smaller than the sum of its proper divisors (24439268).

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

20678812 is a wasteful number, since it uses less digits than its factorization.

20678812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67161 (or 67159 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 20678812 is about 4547.3961780342. The cubic root of 20678812 is about 274.4786242635.

The spelling of 20678812 in words is "twenty million, six hundred seventy-eight thousand, eight hundred twelve".