18048899 has 4 divisors (see below), whose sum is σ = 19689720. Its totient is φ = 16408080.

The previous prime is 18048889. The next prime is 18048907. The reversal of 18048899 is 99884081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99884081 = 11 ⋅9080371.

It is a cyclic number.

It is not a de Polignac number, because 18048899 - 2¹⁶ = 17983363 is a prime.

It is a super-2 number, since 2×18048899² = 651525510224402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18048809) 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, 820394 + ... + 820415.

It is an arithmetic number, because the mean of its divisors is an integer number (4922430).

Almost surely, 2^18048899 is an apocalyptic number.

18048899 is a deficient number, since it is larger than the sum of its proper divisors (1640821).

18048899 is a wasteful number, since it uses less digits than its factorization.

18048899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640820.

The product of its (nonzero) digits is 165888, while the sum is 47.

The square root of 18048899 is about 4248.3995810187. The cubic root of 18048899 is about 262.3112426842.

The spelling of 18048899 in words is "eighteen million, forty-eight thousand, eight hundred ninety-nine".