18158914805 has 16 divisors (see below), whose sum is σ = 22802584320. Its totient is φ = 13856122368.

The previous prime is 18158914777. The next prime is 18158914811. The reversal of 18158914805 is 50841985181.

It is a cyclic number.

It is not a de Polignac number, because 18158914805 - 2¹⁰ = 18158913781 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183065 + ... + 264254.

It is an arithmetic number, because the mean of its divisors is an integer number (1425161520).

Almost surely, 2^18158914805 is an apocalyptic number.

It is an amenable number.

18158914805 is a deficient number, since it is larger than the sum of its proper divisors (4643669515).

18158914805 is a wasteful number, since it uses less digits than its factorization.

18158914805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447700.

The product of its (nonzero) digits is 460800, while the sum is 50.

The spelling of 18158914805 in words is "eighteen billion, one hundred fifty-eight million, nine hundred fourteen thousand, eight hundred five".