18043063632 has 400 divisors, whose sum is σ = 62062545600. Its totient is φ = 4999034880.

The previous prime is 18043063589. The next prime is 18043063657. The reversal of 18043063632 is 23636034081.

18043063632 is a `hidden beast` number, since 18 + 0 + 4 + 3 + 0 + 6 + 3 + 632 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 7853908 + ... + 7856204.

It is an arithmetic number, because the mean of its divisors is an integer number (155156364).

Almost surely, 2^18043063632 is an apocalyptic number.

18043063632 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 18043063632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31031272800).

18043063632 is an abundant number, since it is smaller than the sum of its proper divisors (44019481968).

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

18043063632 is a wasteful number, since it uses less digits than its factorization.

18043063632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2376 (or 2361 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The spelling of 18043063632 in words is "eighteen billion, forty-three million, sixty-three thousand, six hundred thirty-two".