18955822354519 has 2 divisors, whose sum is σ = 18955822354520. Its totient is φ = 18955822354518.

The previous prime is 18955822354489. The next prime is 18955822354571. The reversal of 18955822354519 is 91545322855981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18955822354519 - 2⁵ = 18955822354487 is a prime.

It is a super-2 number, since 2×18955822354519² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18955822354919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9477911177259 + 9477911177260.

It is an arithmetic number, because the mean of its divisors is an integer number (9477911177260).

Almost surely, 2^{18955822354519} is an apocalyptic number.

18955822354519 is a deficient number, since it is larger than the sum of its proper divisors (1).

18955822354519 is an equidigital number, since it uses as much as digits as its factorization.

18955822354519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520000, while the sum is 67.

The spelling of 18955822354519 in words is "eighteen trillion, nine hundred fifty-five billion, eight hundred twenty-two million, three hundred fifty-four thousand, five hundred nineteen".