18804811222427 has 16 divisors (see below), whose sum is σ = 19037677587840. Its totient is φ = 18572884176000.

The previous prime is 18804811222423. The next prime is 18804811222433. The reversal of 18804811222427 is 72422211840881.

It is a cyclic number.

It is not a de Polignac number, because 18804811222427 - 2² = 18804811222423 is a prime.

It is a super-2 number, since 2×18804811222427² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18804811222423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161788649 + ... + 161904837.

It is an arithmetic number, because the mean of its divisors is an integer number (1189854849240).

Almost surely, 2^{18804811222427} is an apocalyptic number.

18804811222427 is a deficient number, since it is larger than the sum of its proper divisors (232866365413).

18804811222427 is a wasteful number, since it uses less digits than its factorization.

18804811222427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120214.

The product of its (nonzero) digits is 917504, while the sum is 50.

The spelling of 18804811222427 in words is "eighteen trillion, eight hundred four billion, eight hundred eleven million, two hundred twenty-two thousand, four hundred twenty-seven".