18611441839 has 2 divisors, whose sum is σ = 18611441840. Its totient is φ = 18611441838.

The previous prime is 18611441819. The next prime is 18611441861. The reversal of 18611441839 is 93814411681.

It is a weak prime.

It is an emirp because it is prime and its reverse (93814411681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18611441839 - 2⁷ = 18611441711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18611441819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9305720919 + 9305720920.

It is an arithmetic number, because the mean of its divisors is an integer number (9305720920).

Almost surely, 2^18611441839 is an apocalyptic number.

18611441839 is a deficient number, since it is larger than the sum of its proper divisors (1).

18611441839 is an equidigital number, since it uses as much as digits as its factorization.

18611441839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 46.

The spelling of 18611441839 in words is "eighteen billion, six hundred eleven million, four hundred forty-one thousand, eight hundred thirty-nine".