18147640583 has 2 divisors, whose sum is σ = 18147640584. Its totient is φ = 18147640582.

The previous prime is 18147640559. The next prime is 18147640603. The reversal of 18147640583 is 38504674181.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18147640583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18147640513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9073820291 + 9073820292.

It is an arithmetic number, because the mean of its divisors is an integer number (9073820292).

Almost surely, 2^18147640583 is an apocalyptic number.

18147640583 is a deficient number, since it is larger than the sum of its proper divisors (1).

18147640583 is an equidigital number, since it uses as much as digits as its factorization.

18147640583 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 18147640583 in words is "eighteen billion, one hundred forty-seven million, six hundred forty thousand, five hundred eighty-three".