18533440032 has 48 divisors (see below), whose sum is σ = 48657399840. Its totient is φ = 6176909312.

The previous prime is 18533440021. The next prime is 18533440063. The reversal of 18533440032 is 23004433581.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×18533440032² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18533439975 and 18533440002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1103248 + ... + 1119920.

It is an arithmetic number, because the mean of its divisors is an integer number (1013695830).

Almost surely, 2^18533440032 is an apocalyptic number.

18533440032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18533440032 is an abundant number, since it is smaller than the sum of its proper divisors (30123959808).

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

18533440032 is a wasteful number, since it uses less digits than its factorization.

18533440032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28265 (or 28257 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The spelling of 18533440032 in words is "eighteen billion, five hundred thirty-three million, four hundred forty thousand, thirty-two".