18999162 has 72 divisors (see below), whose sum is σ = 51600276. Its totient is φ = 5007744.

The previous prime is 18999161. The next prime is 18999179. The reversal of 18999162 is 26199981.

It can be written as a sum of positive squares in 2 ways, for example, as 17464041 + 1535121 = 4179^2 + 1239^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18999161) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10638 + ... + 12294.

Almost surely, 2^18999162 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18999162, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25800138).

18999162 is an abundant number, since it is smaller than the sum of its proper divisors (32601114).

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

18999162 is a wasteful number, since it uses less digits than its factorization.

18999162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692 (or 1682 counting only the distinct ones).

The product of its digits is 69984, while the sum is 45.

The square root of 18999162 is about 4358.8028172883. The cubic root of 18999162 is about 266.8362417960.

The spelling of 18999162 in words is "eighteen million, nine hundred ninety-nine thousand, one hundred sixty-two".