18695274019 has 2 divisors, whose sum is σ = 18695274020. Its totient is φ = 18695274018.

The previous prime is 18695274001. The next prime is 18695274061. The reversal of 18695274019 is 91047259681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18695274019 - 2²¹ = 18693176867 is a prime.

It is a super-2 number, since 2×18695274019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18695272019) by changing a digit.

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 as a sum of consecutive naturals, namely, 9347637009 + 9347637010.

It is an arithmetic number, because the mean of its divisors is an integer number (9347637010).

Almost surely, 2^18695274019 is an apocalyptic number.

18695274019 is a deficient number, since it is larger than the sum of its proper divisors (1).

18695274019 is an equidigital number, since it uses as much as digits as its factorization.

18695274019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 52.

The spelling of 18695274019 in words is "eighteen billion, six hundred ninety-five million, two hundred seventy-four thousand, nineteen".