18973192 has 48 divisors (see below), whose sum is σ = 42835500. Its totient is φ = 7846272.

The previous prime is 18973189. The next prime is 18973217. The reversal of 18973192 is 29137981.

It can be written as a sum of positive squares in 2 ways, for example, as 18957316 + 15876 = 4354^2 + 126^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10534 + ... + 12202.

Almost surely, 2^18973192 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18973192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21417750).

18973192 is an abundant number, since it is smaller than the sum of its proper divisors (23862308).

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

18973192 is a wasteful number, since it uses less digits than its factorization.

18973192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718 (or 1707 counting only the distinct ones).

The product of its digits is 27216, while the sum is 40.

The square root of 18973192 is about 4355.8227695810. The cubic root of 18973192 is about 266.7146066589.

The spelling of 18973192 in words is "eighteen million, nine hundred seventy-three thousand, one hundred ninety-two".