18019452 has 24 divisors (see below), whose sum is σ = 45868032. Its totient is φ = 5460400.

The previous prime is 18019427. The next prime is 18019453. The reversal of 18019452 is 25491081.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18019453) 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 7 ways as a sum of consecutive naturals, for example, 68124 + ... + 68387.

It is an arithmetic number, because the mean of its divisors is an integer number (1911168).

Almost surely, 2^18019452 is an apocalyptic number.

18019452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18019452 is an abundant number, since it is smaller than the sum of its proper divisors (27848580).

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

18019452 is a wasteful number, since it uses less digits than its factorization.

18019452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136529 (or 136527 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 18019452 is about 4244.9325082974. The cubic root of 18019452 is about 262.1685103634.

The spelling of 18019452 in words is "eighteen million, nineteen thousand, four hundred fifty-two".