18715582474801 has 9 divisors (see below), whose sum is σ = 19235244528171. Its totient is φ = 18209600179992.

The previous prime is 18715582474789. The next prime is 18715582474843. The reversal of 18715582474801 is 10847428551781.

It is a happy number.

The square root of 18715582474801 is 4326151.

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

It can be written as a sum of positive squares in only one way, i.e., 16746960213025 + 1968622261776 = 4092305^2 + 1403076^2 .

It is a de Polignac number, because none of the positive numbers 2^k-18715582474801 is a prime.

It is a super-3 number, since 3×18715582474801³ (a number of 41 digits) contains 333 as substring.

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 18715582474801.

It is not an unprimeable number, because it can be changed into a prime (18715582474871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 160009126 + ... + 160126048.

It is an arithmetic number, because the mean of its divisors is an integer number (2137249392019).

Almost surely, 2^{18715582474801} is an apocalyptic number.

18715582474801 is the 4326151-st square number.

18715582474801 is the 2163076-th centered octagonal number.

It is an amenable number.

18715582474801 is a deficient number, since it is larger than the sum of its proper divisors (519662053370).

18715582474801 is an frugal number, since it uses more digits than its factorization.

18715582474801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233920 (or 116960 counting only the distinct ones).

The product of its (nonzero) digits is 20070400, while the sum is 61.

The spelling of 18715582474801 in words is "eighteen trillion, seven hundred fifteen billion, five hundred eighty-two million, four hundred seventy-four thousand, eight hundred one".