18887430032 has 20 divisors (see below), whose sum is σ = 38747007756. Its totient is φ = 8888202240.

The previous prime is 18887430019. The next prime is 18887430041. The reversal of 18887430032 is 23003478881.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16857386896 + 2030043136 = 129836^2 + 45056^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34719269 + ... + 34719812.

Almost surely, 2^18887430032 is an apocalyptic number.

It is an amenable number.

18887430032 is an abundant number, since it is smaller than the sum of its proper divisors (19859577724).

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

18887430032 is a wasteful number, since it uses less digits than its factorization.

18887430032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69439106 (or 69439100 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 44.

The spelling of 18887430032 in words is "eighteen billion, eight hundred eighty-seven million, four hundred thirty thousand, thirty-two".