18099038 has 4 divisors (see below), whose sum is σ = 27148560. Its totient is φ = 9049518.

The previous prime is 18099013. The next prime is 18099041. The reversal of 18099038 is 83099081.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 18098992 and 18099010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4524758 + ... + 4524761.

It is an arithmetic number, because the mean of its divisors is an integer number (6787140).

Almost surely, 2^18099038 is an apocalyptic number.

18099038 is a deficient number, since it is larger than the sum of its proper divisors (9049522).

18099038 is an equidigital number, since it uses as much as digits as its factorization.

18099038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9049521.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 18099038 is about 4254.2964165653. The cubic root of 18099038 is about 262.5539142472.

The spelling of 18099038 in words is "eighteen million, ninety-nine thousand, thirty-eight".