18499442 has 8 divisors (see below), whose sum is σ = 29883756. Its totient is φ = 8538192.

The previous prime is 18499433. The next prime is 18499447. The reversal of 18499442 is 24499481.

It can be written as a sum of positive squares in 2 ways, for example, as 18498601 + 841 = 4301^2 + 29^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×18499442² = 684458708622728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18499442.

It is not an unprimeable number, because it can be changed into a prime (18499447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355733 + ... + 355784.

Almost surely, 2^18499442 is an apocalyptic number.

18499442 is a deficient number, since it is larger than the sum of its proper divisors (11384314).

18499442 is a wasteful number, since it uses less digits than its factorization.

18499442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711532.

The product of its digits is 82944, while the sum is 41.

The square root of 18499442 is about 4301.0977668498. The cubic root of 18499442 is about 264.4759645256.

The spelling of 18499442 in words is "eighteen million, four hundred ninety-nine thousand, four hundred forty-two".