18900470 has 16 divisors (see below), whose sum is σ = 34099488. Its totient is φ = 7542720.

The previous prime is 18900463. The next prime is 18900487. The reversal of 18900470 is 7400981.

It is a Curzon number.

It is a congruent number.

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, 2930 + ... + 6810.

It is an arithmetic number, because the mean of its divisors is an integer number (2131218).

Almost surely, 2^18900470 is an apocalyptic number.

18900470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18900470 is a deficient number, since it is larger than the sum of its proper divisors (15199018).

18900470 is a wasteful number, since it uses less digits than its factorization.

18900470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4375.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 18900470 is about 4347.4670786563. The cubic root of 18900470 is about 266.3734085197.

The spelling of 18900470 in words is "eighteen million, nine hundred thousand, four hundred seventy".