20470408 has 32 divisors (see below), whose sum is σ = 44890560. Its totient is φ = 8568000.

The previous prime is 20470399. The next prime is 20470409. The reversal of 20470408 is 80407402.

It is not an unprimeable number, because it can be changed into a prime (20470409) 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, 1843 + ... + 6658.

It is an arithmetic number, because the mean of its divisors is an integer number (1402830).

Almost surely, 2^20470408 is an apocalyptic number.

20470408 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20470408 is an abundant number, since it is smaller than the sum of its proper divisors (24420152).

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

20470408 is a wasteful number, since it uses less digits than its factorization.

20470408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8557 (or 8553 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 20470408 is about 4524.4234991875. The cubic root of 20470408 is about 273.5534310239.

The spelling of 20470408 in words is "twenty million, four hundred seventy thousand, four hundred eight".