20457008 has 40 divisors (see below), whose sum is σ = 46569936. Its totient is φ = 8582400.

The previous prime is 20456987. The next prime is 20457023. The reversal of 20457008 is 80075402.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2183 + ... + 6758.

Almost surely, 2^20457008 is an apocalyptic number.

It is an amenable number.

20457008 is an abundant number, since it is smaller than the sum of its proper divisors (26112928).

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

20457008 is a wasteful number, since it uses less digits than its factorization.

20457008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8973 (or 8967 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 20457008 is about 4522.9424051164. The cubic root of 20457008 is about 273.4937283202.

The spelling of 20457008 in words is "twenty million, four hundred fifty-seven thousand, eight".