18695274061 has 2 divisors, whose sum is σ = 18695274062. Its totient is φ = 18695274060.

The previous prime is 18695274019. The next prime is 18695274077. The reversal of 18695274061 is 16047259681.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10413182025 + 8282092036 = 102045^2 + 91006^2 .

It is an emirp because it is prime and its reverse (16047259681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18695274061 - 2⁹ = 18695273549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18695273996 and 18695274014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18695274001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9347637030 + 9347637031.

It is an arithmetic number, because the mean of its divisors is an integer number (9347637031).

Almost surely, 2^18695274061 is an apocalyptic number.

It is an amenable number.

18695274061 is a deficient number, since it is larger than the sum of its proper divisors (1).

18695274061 is an equidigital number, since it uses as much as digits as its factorization.

18695274061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 18695274061 in words is "eighteen billion, six hundred ninety-five million, two hundred seventy-four thousand, sixty-one".