18198507724819 has 2 divisors, whose sum is σ = 18198507724820. Its totient is φ = 18198507724818.

The previous prime is 18198507724777. The next prime is 18198507724823. The reversal of 18198507724819 is 91842770589181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18198507724819 - 2¹⁵ = 18198507692051 is a prime.

It is a super-2 number, since 2×18198507724819² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18198507724879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9099253862409 + 9099253862410.

It is an arithmetic number, because the mean of its divisors is an integer number (9099253862410).

Almost surely, 2^{18198507724819} is an apocalyptic number.

18198507724819 is a deficient number, since it is larger than the sum of its proper divisors (1).

18198507724819 is an equidigital number, since it uses as much as digits as its factorization.

18198507724819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81285120, while the sum is 70.

The spelling of 18198507724819 in words is "eighteen trillion, one hundred ninety-eight billion, five hundred seven million, seven hundred twenty-four thousand, eight hundred nineteen".