18888099 has 4 divisors (see below), whose sum is σ = 25184136. Its totient is φ = 12592064.

The previous prime is 18888097. The next prime is 18888113. The reversal of 18888099 is 99088881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99088881 = 3 ⋅33029627.

It is a cyclic number.

It is not a de Polignac number, because 18888099 - 2¹ = 18888097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18888097) 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, 3148014 + ... + 3148019.

It is an arithmetic number, because the mean of its divisors is an integer number (6296034).

Almost surely, 2^18888099 is an apocalyptic number.

18888099 is a deficient number, since it is larger than the sum of its proper divisors (6296037).

18888099 is an equidigital number, since it uses as much as digits as its factorization.

18888099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6296036.

The product of its (nonzero) digits is 331776, while the sum is 51.

The square root of 18888099 is about 4346.0440632833. The cubic root of 18888099 is about 266.3152790189.

The spelling of 18888099 in words is "eighteen million, eight hundred eighty-eight thousand, ninety-nine".