18867926419 has 2 divisors, whose sum is σ = 18867926420. Its totient is φ = 18867926418.

The previous prime is 18867926401. The next prime is 18867926431. The reversal of 18867926419 is 91462976881.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18867926419 - 2²¹ = 18865829267 is a prime.

It is a super-2 number, since 2×18867926419² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18867926479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9433963209 + 9433963210.

It is an arithmetic number, because the mean of its divisors is an integer number (9433963210).

Almost surely, 2^18867926419 is an apocalyptic number.

18867926419 is a deficient number, since it is larger than the sum of its proper divisors (1).

18867926419 is an equidigital number, since it uses as much as digits as its factorization.

18867926419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10450944, while the sum is 61.

The spelling of 18867926419 in words is "eighteen billion, eight hundred sixty-seven million, nine hundred twenty-six thousand, four hundred nineteen".