18011913003 has 32 divisors (see below), whose sum is σ = 30578240000. Its totient is φ = 10264887648.

The previous prime is 18011912993. The next prime is 18011913047. The reversal of 18011913003 is 30031911081.

It is a happy number.

It is not a de Polignac number, because 18011913003 - 2⁴ = 18011912987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (18011913103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57253 + ... + 198246.

It is an arithmetic number, because the mean of its divisors is an integer number (955570000).

Almost surely, 2^18011913003 is an apocalyptic number.

18011913003 is a deficient number, since it is larger than the sum of its proper divisors (12566326997).

18011913003 is a wasteful number, since it uses less digits than its factorization.

18011913003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255888 (or 255882 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The spelling of 18011913003 in words is "eighteen billion, eleven million, nine hundred thirteen thousand, three".