18278732000 has 48 divisors (see below), whose sum is σ = 44910854352. Its totient is φ = 7311491200.

The previous prime is 18278731969. The next prime is 18278732009. The reversal of 18278732000 is 23787281.

It is a super-2 number, since 2×18278732000² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18278732009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2280842 + ... + 2288841.

It is an arithmetic number, because the mean of its divisors is an integer number (935642799).

Almost surely, 2^18278732000 is an apocalyptic number.

18278732000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18278732000 is an abundant number, since it is smaller than the sum of its proper divisors (26632122352).

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

18278732000 is an equidigital number, since it uses as much as digits as its factorization.

18278732000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4569708 (or 4569690 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 38.

The spelling of 18278732000 in words is "eighteen billion, two hundred seventy-eight million, seven hundred thirty-two thousand".