18083987533 has 16 divisors (see below), whose sum is σ = 18943580160. Its totient is φ = 17241481600.

The previous prime is 18083987531. The next prime is 18083987543. The reversal of 18083987533 is 33578938081.

It is a cyclic number.

It is not a de Polignac number, because 18083987533 - 2¹ = 18083987531 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18083987531) 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, 746928 + ... + 770758.

It is an arithmetic number, because the mean of its divisors is an integer number (1183973760).

Almost surely, 2^18083987533 is an apocalyptic number.

It is an amenable number.

18083987533 is a deficient number, since it is larger than the sum of its proper divisors (859592627).

18083987533 is a wasteful number, since it uses less digits than its factorization.

18083987533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24188.

The product of its (nonzero) digits is 4354560, while the sum is 55.

The spelling of 18083987533 in words is "eighteen billion, eighty-three million, nine hundred eighty-seven thousand, five hundred thirty-three".