18147861796 has 27 divisors (see below), whose sum is σ = 32015899251. Its totient is φ = 9001050624.

The previous prime is 18147861779. The next prime is 18147861829. The reversal of 18147861796 is 69716874181.

The square root of 18147861796 is 134714.

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

It can be written as a sum of positive squares in 4 ways, for example, as 13468900 + 18134392896 = 3670^2 + 134664^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18147861796.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 51999430 + ... + 51999778.

Almost surely, 2^18147861796 is an apocalyptic number.

18147861796 is the 134714-th square number.

It is an amenable number.

18147861796 is a deficient number, since it is larger than the sum of its proper divisors (13868037455).

18147861796 is an frugal number, since it uses more digits than its factorization.

18147861796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088 (or 544 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 58.

The spelling of 18147861796 in words is "eighteen billion, one hundred forty-seven million, eight hundred sixty-one thousand, seven hundred ninety-six".