18196452 has 72 divisors (see below), whose sum is σ = 49795200. Its totient is φ = 5583168.

The previous prime is 18196447. The next prime is 18196459. The reversal of 18196452 is 25469181.

18196452 is a `hidden beast` number, since 1 + 8 + 1 + 9 + 645 + 2 = 666.

It is a super-2 number, since 2×18196452² = 662221730776608, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (18196459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24949 + ... + 25667.

It is an arithmetic number, because the mean of its divisors is an integer number (691600).

Almost surely, 2^18196452 is an apocalyptic number.

18196452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18196452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24897600).

18196452 is an abundant number, since it is smaller than the sum of its proper divisors (31598748).

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

18196452 is a wasteful number, since it uses less digits than its factorization.

18196452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785 (or 780 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 18196452 is about 4265.7299492584. The cubic root of 18196452 is about 263.0241174566.

The spelling of 18196452 in words is "eighteen million, one hundred ninety-six thousand, four hundred fifty-two".