18709422419 has 2 divisors, whose sum is σ = 18709422420. Its totient is φ = 18709422418.

The previous prime is 18709422409. The next prime is 18709422451. The reversal of 18709422419 is 91422490781.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18709422419 is a prime.

It is a super-2 number, since 2×18709422419² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18709422409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9354711209 + 9354711210.

It is an arithmetic number, because the mean of its divisors is an integer number (9354711210).

Almost surely, 2^18709422419 is an apocalyptic number.

18709422419 is a deficient number, since it is larger than the sum of its proper divisors (1).

18709422419 is an equidigital number, since it uses as much as digits as its factorization.

18709422419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 47.

The spelling of 18709422419 in words is "eighteen billion, seven hundred nine million, four hundred twenty-two thousand, four hundred nineteen".