20406108 has 24 divisors (see below), whose sum is σ = 48054160. Its totient is φ = 6739200.

The previous prime is 20406107. The next prime is 20406109. The reversal of 20406108 is 80160402.

It is an interprime number because it is at equal distance from previous prime (20406107) and next prime (20406109).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20406107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6493 + ... + 9108.

Almost surely, 2^20406108 is an apocalyptic number.

It is an amenable number.

20406108 is an abundant number, since it is smaller than the sum of its proper divisors (27648052).

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

20406108 is a wasteful number, since it uses less digits than its factorization.

20406108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15717 (or 15715 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 20406108 is about 4517.3120326141. The cubic root of 20406108 is about 273.2667092560.

The spelling of 20406108 in words is "twenty million, four hundred six thousand, one hundred eight".