20308708 has 24 divisors (see below), whose sum is σ = 41717312. Its totient is φ = 8468064.

The previous prime is 20308681. The next prime is 20308723. The reversal of 20308708 is 80780302.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 8766 + ... + 10837.

Almost surely, 2^20308708 is an apocalyptic number.

20308708 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20308708 is an abundant number, since it is smaller than the sum of its proper divisors (21408604).

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

20308708 is a wasteful number, since it uses less digits than its factorization.

20308708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19651 (or 19649 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 20308708 is about 4506.5183900657. The cubic root of 20308708 is about 272.8312409935.

The spelling of 20308708 in words is "twenty million, three hundred eight thousand, seven hundred eight".