18698491332 has 192 divisors, whose sum is σ = 51577344000. Its totient is φ = 5919176736.

The previous prime is 18698491307. The next prime is 18698491363. The reversal of 18698491332 is 23319489681.

18698491332 is a `hidden beast` number, since 186 + 98 + 49 + 1 + 332 = 666.

It is a super-3 number, since 3×18698491332³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 40039363 + ... + 40039829.

It is an arithmetic number, because the mean of its divisors is an integer number (268632000).

Almost surely, 2^18698491332 is an apocalyptic number.

18698491332 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 18698491332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25788672000).

18698491332 is an abundant number, since it is smaller than the sum of its proper divisors (32878852668).

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

18698491332 is a wasteful number, since it uses less digits than its factorization.

18698491332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714 (or 694 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The spelling of 18698491332 in words is "eighteen billion, six hundred ninety-eight million, four hundred ninety-one thousand, three hundred thirty-two".