18013511153 has 12 divisors (see below), whose sum is σ = 20482736820. Its totient is φ = 15811229280.

The previous prime is 18013511149. The next prime is 18013511179. The reversal of 18013511153 is 35111531081.

It can be written as a sum of positive squares in 2 ways, for example, as 3724416784 + 14289094369 = 61028^2 + 119537^2 .

It is not a de Polignac number, because 18013511153 - 2² = 18013511149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18013511183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2563250 + ... + 2570267.

It is an arithmetic number, because the mean of its divisors is an integer number (1706894735).

Almost surely, 2^18013511153 is an apocalyptic number.

It is an amenable number.

18013511153 is a deficient number, since it is larger than the sum of its proper divisors (2469225667).

18013511153 is a wasteful number, since it uses less digits than its factorization.

18013511153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5133568 (or 5133557 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 29.

The spelling of 18013511153 in words is "eighteen billion, thirteen million, five hundred eleven thousand, one hundred fifty-three".