18345428371 has 2 divisors, whose sum is σ = 18345428372. Its totient is φ = 18345428370.

The previous prime is 18345428357. The next prime is 18345428411. The reversal of 18345428371 is 17382454381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18345428371 - 2²¹ = 18343331219 is a prime.

It is not a weakly prime, because it can be changed into another prime (18345458371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9172714185 + 9172714186.

It is an arithmetic number, because the mean of its divisors is an integer number (9172714186).

Almost surely, 2^18345428371 is an apocalyptic number.

18345428371 is a deficient number, since it is larger than the sum of its proper divisors (1).

18345428371 is an equidigital number, since it uses as much as digits as its factorization.

18345428371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 645120, while the sum is 46.

The spelling of 18345428371 in words is "eighteen billion, three hundred forty-five million, four hundred twenty-eight thousand, three hundred seventy-one".