18083987532 has 96 divisors (see below), whose sum is σ = 51318868160. Its totient is φ = 5473059840.

The previous prime is 18083987531. The next prime is 18083987543. The reversal of 18083987532 is 23578938081.

18083987532 is a `hidden beast` number, since 18 + 0 + 8 + 3 + 98 + 7 + 532 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 31 ways as a sum of consecutive naturals, for example, 19933 + ... + 191220.

Almost surely, 2^18083987532 is an apocalyptic number.

18083987532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18083987532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25659434080).

18083987532 is an abundant number, since it is smaller than the sum of its proper divisors (33234880628).

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

18083987532 is a wasteful number, since it uses less digits than its factorization.

18083987532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211240 (or 211232 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 18083987532 in words is "eighteen billion, eighty-three million, nine hundred eighty-seven thousand, five hundred thirty-two".