18470899 has 4 divisors (see below), whose sum is σ = 18479664. Its totient is φ = 18462136.

The previous prime is 18470873. The next prime is 18470923. The reversal of 18470899 is 99807481.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18470899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18470819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 909 + ... + 6145.

It is an arithmetic number, because the mean of its divisors is an integer number (4619916).

Almost surely, 2^18470899 is an apocalyptic number.

18470899 is a deficient number, since it is larger than the sum of its proper divisors (8765).

18470899 is an equidigital number, since it uses as much as digits as its factorization.

18470899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8764.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 18470899 is about 4297.7783795817. The cubic root of 18470899 is about 264.3398735157.

The spelling of 18470899 in words is "eighteen million, four hundred seventy thousand, eight hundred ninety-nine".