18017897234 has 8 divisors (see below), whose sum is σ = 27266021820. Its totient is φ = 8929223296.

The previous prime is 18017897197. The next prime is 18017897243. The reversal of 18017897234 is 43279871081.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17370449209 + 647448025 = 131797^2 + 25445^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39862379 + ... + 39862830.

Almost surely, 2^18017897234 is an apocalyptic number.

18017897234 is a deficient number, since it is larger than the sum of its proper divisors (9248124586).

18017897234 is a wasteful number, since it uses less digits than its factorization.

18017897234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79725324.

The product of its (nonzero) digits is 677376, while the sum is 50.

The spelling of 18017897234 in words is "eighteen billion, seventeen million, eight hundred ninety-seven thousand, two hundred thirty-four".