18372828349 has 2 divisors, whose sum is σ = 18372828350. Its totient is φ = 18372828348.

The previous prime is 18372828337. The next prime is 18372828391. The reversal of 18372828349 is 94382827381.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16023002724 + 2349825625 = 126582^2 + 48475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18372828349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18372828349.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18372825349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9186414174 + 9186414175.

It is an arithmetic number, because the mean of its divisors is an integer number (9186414175).

Almost surely, 2^18372828349 is an apocalyptic number.

It is an amenable number.

18372828349 is a deficient number, since it is larger than the sum of its proper divisors (1).

18372828349 is an equidigital number, since it uses as much as digits as its factorization.

18372828349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4644864, while the sum is 55.

The spelling of 18372828349 in words is "eighteen billion, three hundred seventy-two million, eight hundred twenty-eight thousand, three hundred forty-nine".