20408108 has 18 divisors (see below), whose sum is σ = 41545476. Its totient is φ = 8746248.

The previous prime is 20408081. The next prime is 20408117. The reversal of 20408108 is 80180402.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51866 + ... + 52257.

It is an arithmetic number, because the mean of its divisors is an integer number (2308082).

Almost surely, 2^20408108 is an apocalyptic number.

20408108 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20408108 is an abundant number, since it is smaller than the sum of its proper divisors (21137368).

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

20408108 is a wasteful number, since it uses less digits than its factorization.

20408108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104141 (or 104132 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 20408108 is about 4517.5333977736. The cubic root of 20408108 is about 273.2756365759.

The spelling of 20408108 in words is "twenty million, four hundred eight thousand, one hundred eight".