20679408 has 40 divisors (see below), whose sum is σ = 59358800. Its totient is φ = 6892992.

The previous prime is 20679401. The next prime is 20679409. The reversal of 20679408 is 80497602.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20679401) 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 7 ways as a sum of consecutive naturals, for example, 23503 + ... + 24366.

It is an arithmetic number, because the mean of its divisors is an integer number (1483970).

Almost surely, 2^20679408 is an apocalyptic number.

It is an amenable number.

20679408 is an abundant number, since it is smaller than the sum of its proper divisors (38679392).

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

20679408 is a wasteful number, since it uses less digits than its factorization.

20679408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47886 (or 47874 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 20679408 is about 4547.4617095694. The cubic root of 20679408 is about 274.4812612249.

The spelling of 20679408 in words is "twenty million, six hundred seventy-nine thousand, four hundred eight".