18372828391 has 2 divisors, whose sum is σ = 18372828392. Its totient is φ = 18372828390.

The previous prime is 18372828349. The next prime is 18372828427. The reversal of 18372828391 is 19382827381.

It is a strong prime.

It is an emirp because it is prime and its reverse (19382827381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18372828391 - 2¹¹ = 18372826343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18372828301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9186414195 + 9186414196.

It is an arithmetic number, because the mean of its divisors is an integer number (9186414196).

Almost surely, 2^18372828391 is an apocalyptic number.

18372828391 is a deficient number, since it is larger than the sum of its proper divisors (1).

18372828391 is an equidigital number, since it uses as much as digits as its factorization.

18372828391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 52.

The spelling of 18372828391 in words is "eighteen billion, three hundred seventy-two million, eight hundred twenty-eight thousand, three hundred ninety-one".