18493272000 has 896 divisors, whose sum is σ = 79019765760. Its totient is φ = 4199040000.

The previous prime is 18493271981. The next prime is 18493272001. The reversal of 18493272000 is 27239481.

It is a super-2 number, since 2×18493272000² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18493272001) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 122471925 + ... + 122472075.

Almost surely, 2^18493272000 is an apocalyptic number.

18493272000 is a gapful number since it is divisible by the number (10) 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 18493272000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39509882880).

18493272000 is an abundant number, since it is smaller than the sum of its proper divisors (60526493760).

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

18493272000 is an frugal number, since it uses more digits than its factorization.

18493272000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 18493272000 in words is "eighteen billion, four hundred ninety-three million, two hundred seventy-two thousand".