18516498 has 64 divisors (see below), whose sum is σ = 49738752. Its totient is φ = 4438080.

The previous prime is 18516479. The next prime is 18516499. The reversal of 18516498 is 89461581.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18516499) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4465 + ... + 7547.

It is an arithmetic number, because the mean of its divisors is an integer number (777168).

Almost surely, 2^18516498 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18516498, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24869376).

18516498 is an abundant number, since it is smaller than the sum of its proper divisors (31222254).

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

18516498 is a wasteful number, since it uses less digits than its factorization.

18516498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3119.

The product of its digits is 69120, while the sum is 42.

The square root of 18516498 is about 4303.0800596782. The cubic root of 18516498 is about 264.5572195251.

The spelling of 18516498 in words is "eighteen million, five hundred sixteen thousand, four hundred ninety-eight".