18992449 has 12 divisors (see below), whose sum is σ = 22178928. Its totient is φ = 16216200.

The previous prime is 18992431. The next prime is 18992461. The reversal of 18992449 is 94429981.

It is not a de Polignac number, because 18992449 - 2⁹ = 18991937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18992399 and 18992408.

It is not an unprimeable number, because it can be changed into a prime (18993449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15634 + ... + 16804.

It is an arithmetic number, because the mean of its divisors is an integer number (1848244).

Almost surely, 2^18992449 is an apocalyptic number.

It is an amenable number.

18992449 is a deficient number, since it is larger than the sum of its proper divisors (3186479).

18992449 is a wasteful number, since it uses less digits than its factorization.

18992449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516 (or 1509 counting only the distinct ones).

The product of its digits is 186624, while the sum is 46.

The square root of 18992449 is about 4358.0326983629. The cubic root of 18992449 is about 266.8048108886.

The spelling of 18992449 in words is "eighteen million, nine hundred ninety-two thousand, four hundred forty-nine".