18552239999 has 6 divisors (see below), whose sum is σ = 18790057440. Its totient is φ = 18317395356.

The previous prime is 18552239987. The next prime is 18552240023. The reversal of 18552239999 is 99993225581.

It is not a de Polignac number, because 18552239999 - 2⁸ = 18552239743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18552239969) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1480079 + ... + 1492560.

It is an arithmetic number, because the mean of its divisors is an integer number (3131676240).

Almost surely, 2^18552239999 is an apocalyptic number.

18552239999 is a deficient number, since it is larger than the sum of its proper divisors (237817441).

18552239999 is an frugal number, since it uses more digits than its factorization.

18552239999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2972797 (or 2972718 counting only the distinct ones).

The product of its digits is 15746400, while the sum is 62.

The spelling of 18552239999 in words is "eighteen billion, five hundred fifty-two million, two hundred thirty-nine thousand, nine hundred ninety-nine".