18919452 has 24 divisors (see below), whose sum is σ = 44576896. Its totient is φ = 6244848.

The previous prime is 18919451. The next prime is 18919493. The reversal of 18919452 is 25491981.

It is a self number, because there is not a number n which added to its sum of digits gives 18919452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18919451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6418 + ... + 8889.

Almost surely, 2^18919452 is an apocalyptic number.

18919452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18919452 is an abundant number, since it is smaller than the sum of its proper divisors (25657444).

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

18919452 is a wasteful number, since it uses less digits than its factorization.

18919452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15417 (or 15415 counting only the distinct ones).

The product of its digits is 25920, while the sum is 39.

The square root of 18919452 is about 4349.6496410631. The cubic root of 18919452 is about 266.4625528334.

The spelling of 18919452 in words is "eighteen million, nine hundred nineteen thousand, four hundred fifty-two".