18349458 has 32 divisors (see below), whose sum is σ = 38707200. Its totient is φ = 5790480.

The previous prime is 18349439. The next prime is 18349481. The reversal of 18349458 is 85494381.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7693 + ... + 9791.

It is an arithmetic number, because the mean of its divisors is an integer number (1209600).

Almost surely, 2^18349458 is an apocalyptic number.

18349458 is an abundant number, since it is smaller than the sum of its proper divisors (20357742).

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

18349458 is a wasteful number, since it uses less digits than its factorization.

18349458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2182.

The product of its digits is 138240, while the sum is 42.

The square root of 18349458 is about 4283.6267344389. The cubic root of 18349458 is about 263.7592789650.

The spelling of 18349458 in words is "eighteen million, three hundred forty-nine thousand, four hundred fifty-eight".