18998354 has 16 divisors (see below), whose sum is σ = 29147040. Its totient is φ = 9284640.

The previous prime is 18998321. The next prime is 18998359. The reversal of 18998354 is 45389981.

18998354 = T₃₇₂ + T₃₇₃ + ... + T₅₄₈.

It is a junction number, because it is equal to n+sod(n) for n = 18998299 and 18998308.

It is not an unprimeable number, because it can be changed into a prime (18998359) 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, 27149 + ... + 27839.

It is an arithmetic number, because the mean of its divisors is an integer number (1821690).

Almost surely, 2^18998354 is an apocalyptic number.

18998354 is a deficient number, since it is larger than the sum of its proper divisors (10148686).

18998354 is a wasteful number, since it uses less digits than its factorization.

18998354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985.

The product of its digits is 311040, while the sum is 47.

The square root of 18998354 is about 4358.7101303023. The cubic root of 18998354 is about 266.8324590547.

The spelling of 18998354 in words is "eighteen million, nine hundred ninety-eight thousand, three hundred fifty-four".