18705503900196 has 135 divisors (see below), whose sum is σ = 49152928892067. Its totient is φ = 6203067920640.

The previous prime is 18705503900183. The next prime is 18705503900197. The reversal of 18705503900196 is 69100930550781.

The square root of 18705503900196 is 4324986.

It is a perfect power (a square), and thus also a powerful number.

18705503900196 is a `hidden beast` number, since 1 + 8 + 70 + 550 + 3 + 9 + 0 + 0 + 19 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7162742268900 + 11542761631296 = 2676330^2 + 3397464^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18705503900197) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 18761788770 + ... + 18761789766.

Almost surely, 2^{18705503900196} is an apocalyptic number.

18705503900196 is the 4324986-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18705503900196

18705503900196 is an abundant number, since it is smaller than the sum of its proper divisors (30447424991871).

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

18705503900196 is an frugal number, since it uses more digits than its factorization.

18705503900196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2492 (or 1243 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 54.

The spelling of 18705503900196 in words is "eighteen trillion, seven hundred five billion, five hundred three million, nine hundred thousand, one hundred ninety-six".