18446228244881 has 2 divisors, whose sum is σ = 18446228244882. Its totient is φ = 18446228244880.

The previous prime is 18446228244859. The next prime is 18446228244911. The reversal of 18446228244881 is 18844282264481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16701607297600 + 1744620947281 = 4086760^2 + 1320841^2 .

It is a cyclic number.

It is not a de Polignac number, because 18446228244881 - 2¹⁰ = 18446228243857 is a prime.

It is a super-2 number, since 2×18446228244881² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18446228244481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9223114122440 + 9223114122441.

It is an arithmetic number, because the mean of its divisors is an integer number (9223114122441).

Almost surely, 2^{18446228244881} is an apocalyptic number.

It is an amenable number.

18446228244881 is a deficient number, since it is larger than the sum of its proper divisors (1).

18446228244881 is an equidigital number, since it uses as much as digits as its factorization.

18446228244881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50331648, while the sum is 62.

The spelling of 18446228244881 in words is "eighteen trillion, four hundred forty-six billion, two hundred twenty-eight million, two hundred forty-four thousand, eight hundred eighty-one".