18065069538 has 32 divisors (see below), whose sum is σ = 38217488256. Its totient is φ = 5680971648.

The previous prime is 18065069537. The next prime is 18065069563. The reversal of 18065069538 is 83596056081.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18065069537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 886545 + ... + 906692.

It is an arithmetic number, because the mean of its divisors is an integer number (1194296508).

Almost surely, 2^18065069538 is an apocalyptic number.

18065069538 is an abundant number, since it is smaller than the sum of its proper divisors (20152418718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18065069538 is a wasteful number, since it uses less digits than its factorization.

18065069538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793338.

The product of its (nonzero) digits is 1555200, while the sum is 51.

The spelling of 18065069538 in words is "eighteen billion, sixty-five million, sixty-nine thousand, five hundred thirty-eight".