18696018600 has 864 divisors, whose sum is σ = 79660671480. Its totient is φ = 3901685760.

The previous prime is 18696018581. The next prime is 18696018631. The reversal of 18696018600 is 681069681.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 4398077124 + 14297941476 = 66318^2 + 119574^2 .

It is a super-2 number, since 2×18696018600² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 55477632 + ... + 55477968.

Almost surely, 2^18696018600 is an apocalyptic number.

18696018600 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 18696018600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39830335740).

18696018600 is an abundant number, since it is smaller than the sum of its proper divisors (60964652880).

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

18696018600 is a wasteful number, since it uses less digits than its factorization.

18696018600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427 (or 408 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 18696018600 in words is "eighteen billion, six hundred ninety-six million, eighteen thousand, six hundred".