18213244299 has 12 divisors (see below), whose sum is σ = 26351801112. Its totient is φ = 12121956000.

The previous prime is 18213244297. The next prime is 18213244369. The reversal of 18213244299 is 99244231281.

18213244299 is a `hidden beast` number, since 1 + 8 + 213 + 2 + 4 + 429 + 9 = 666.

It is not a de Polignac number, because 18213244299 - 2¹ = 18213244297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18213244297) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1678197 + ... + 1689014.

It is an arithmetic number, because the mean of its divisors is an integer number (2195983426).

Almost surely, 2^18213244299 is an apocalyptic number.

18213244299 is a deficient number, since it is larger than the sum of its proper divisors (8138556813).

18213244299 is a wasteful number, since it uses less digits than its factorization.

18213244299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3367818 (or 3367815 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The spelling of 18213244299 in words is "eighteen billion, two hundred thirteen million, two hundred forty-four thousand, two hundred ninety-nine".