18451853232 has 160 divisors (see below), whose sum is σ = 50714087424. Its totient is φ = 5770828800.

The previous prime is 18451853207. The next prime is 18451853239. The reversal of 18451853232 is 23235815481.

It is not an unprimeable number, because it can be changed into a prime (18451853239) 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, 25380453 + ... + 25381179.

Almost surely, 2^18451853232 is an apocalyptic number.

18451853232 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 18451853232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25357043712).

18451853232 is an abundant number, since it is smaller than the sum of its proper divisors (32262234192).

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

18451853232 is a wasteful number, since it uses less digits than its factorization.

18451853232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267 (or 1261 counting only the distinct ones).

The product of its digits is 230400, while the sum is 42.

The spelling of 18451853232 in words is "eighteen billion, four hundred fifty-one million, eight hundred fifty-three thousand, two hundred thirty-two".