18955822354559 has 16 divisors (see below), whose sum is σ = 19984598925984. Its totient is φ = 17958991142400.

The previous prime is 18955822354519. The next prime is 18955822354571. The reversal of 18955822354559 is 95545322855981.

It is not a de Polignac number, because 18955822354559 - 2⁴⁰ = 17856310726783 is a prime.

It is a super-2 number, since 2×18955822354559² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18955822354492 and 18955822354501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18955822354519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30770222 + ... + 31380219.

It is an arithmetic number, because the mean of its divisors is an integer number (1249037432874).

Almost surely, 2^{18955822354559} is an apocalyptic number.

18955822354559 is a deficient number, since it is larger than the sum of its proper divisors (1028776571425).

18955822354559 is a wasteful number, since it uses less digits than its factorization.

18955822354559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62150698.

The product of its digits is 777600000, while the sum is 71.

The spelling of 18955822354559 in words is "eighteen trillion, nine hundred fifty-five billion, eight hundred twenty-two million, three hundred fifty-four thousand, five hundred fifty-nine".