18985498 has 32 divisors (see below), whose sum is σ = 34708608. Its totient is φ = 7603200.

The previous prime is 18985451. The next prime is 18985513. The reversal of 18985498 is 89458981.

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, 57193 + ... + 57523.

It is an arithmetic number, because the mean of its divisors is an integer number (1084644).

Almost surely, 2^18985498 is an apocalyptic number.

18985498 is a deficient number, since it is larger than the sum of its proper divisors (15723110).

18985498 is a wasteful number, since it uses less digits than its factorization.

18985498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598.

The product of its digits is 829440, while the sum is 52.

The square root of 18985498 is about 4357.2351325124. The cubic root of 18985498 is about 266.7722578367.

It can be divided in two parts, 1898 and 5498, that added together give a square (7396 = 86²).

The spelling of 18985498 in words is "eighteen million, nine hundred eighty-five thousand, four hundred ninety-eight".