18033911999 has 8 divisors (see below), whose sum is σ = 18632227488. Its totient is φ = 17441434080.

The previous prime is 18033911983. The next prime is 18033912037. The reversal of 18033911999 is 99911933081.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18033911999 - 2⁴ = 18033911983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18033911999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18033911939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1453112 + ... + 1465469.

It is an arithmetic number, because the mean of its divisors is an integer number (2329028436).

Almost surely, 2^18033911999 is an apocalyptic number.

18033911999 is a deficient number, since it is larger than the sum of its proper divisors (598315489).

18033911999 is a wasteful number, since it uses less digits than its factorization.

18033911999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2918785.

The product of its (nonzero) digits is 472392, while the sum is 53.

The spelling of 18033911999 in words is "eighteen billion, thirty-three million, nine hundred eleven thousand, nine hundred ninety-nine".