18693774055 has 64 divisors (see below), whose sum is σ = 26942284800. Its totient is φ = 12291333120.

The previous prime is 18693774053. The next prime is 18693774109. The reversal of 18693774055 is 55047739681.

It is not a de Polignac number, because 18693774055 - 2¹ = 18693774053 is a prime.

It is a super-2 number, since 2×18693774055² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a junction number, because it is equal to n+sod(n) for n = 18693773987 and 18693774005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18693774053) 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 63 ways as a sum of consecutive naturals, for example, 17040267 + ... + 17041363.

It is an arithmetic number, because the mean of its divisors is an integer number (420973200).

Almost surely, 2^18693774055 is an apocalyptic number.

18693774055 is a deficient number, since it is larger than the sum of its proper divisors (8248510745).

18693774055 is a wasteful number, since it uses less digits than its factorization.

18693774055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1864.

The product of its (nonzero) digits is 6350400, while the sum is 55.

The spelling of 18693774055 in words is "eighteen billion, six hundred ninety-three million, seven hundred seventy-four thousand, fifty-five".