18402799 has 4 divisors (see below), whose sum is σ = 18537264. Its totient is φ = 18268336.

The previous prime is 18402779. The next prime is 18402817. The reversal of 18402799 is 99720481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99720481 = 7 ⋅14245783.

It is a cyclic number.

It is not a de Polignac number, because 18402799 - 2¹¹ = 18400751 is a prime.

It is a super-2 number, since 2×18402799² = 677326022068802, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18402719) 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, 67027 + ... + 67300.

It is an arithmetic number, because the mean of its divisors is an integer number (4634316).

Almost surely, 2^18402799 is an apocalyptic number.

18402799 is a deficient number, since it is larger than the sum of its proper divisors (134465).

18402799 is a wasteful number, since it uses less digits than its factorization.

18402799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134464.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 18402799 is about 4289.8483656185. The cubic root of 18402799 is about 264.0146102643.

The spelling of 18402799 in words is "eighteen million, four hundred two thousand, seven hundred ninety-nine".