18083987496 has 24 divisors (see below), whose sum is σ = 48977466330. Its totient is φ = 6027995808.

The previous prime is 18083987437. The next prime is 18083987497. The reversal of 18083987496 is 69478938081.

It can be written as a sum of positive squares in only one way, i.e., 17711883396 + 372104100 = 133086^2 + 19290^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (18083987497) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 125583175 + ... + 125583318.

Almost surely, 2^18083987496 is an apocalyptic number.

It is an amenable number.

18083987496 is an abundant number, since it is smaller than the sum of its proper divisors (30893478834).

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

18083987496 is a wasteful number, since it uses less digits than its factorization.

18083987496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251166505 (or 251166498 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 63.

The spelling of 18083987496 in words is "eighteen billion, eighty-three million, nine hundred eighty-seven thousand, four hundred ninety-six".