18211928282011 has 16 divisors (see below), whose sum is σ = 18551202329088. Its totient is φ = 17875045787200.

The previous prime is 18211928281999. The next prime is 18211928282057. The reversal of 18211928282011 is 11028282911281.

It is a cyclic number.

It is not a de Polignac number, because 18211928282011 - 2²⁷ = 18211794064283 is a prime.

It is a super-2 number, since 2×18211928282011² (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 (18211928282071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27325440 + ... + 27983986.

It is an arithmetic number, because the mean of its divisors is an integer number (1159450145568).

Almost surely, 2^{18211928282011} is an apocalyptic number.

18211928282011 is a deficient number, since it is larger than the sum of its proper divisors (339274047077).

18211928282011 is a wasteful number, since it uses less digits than its factorization.

18211928282011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660362.

The product of its (nonzero) digits is 73728, while the sum is 46.

The spelling of 18211928282011 in words is "eighteen trillion, two hundred eleven billion, nine hundred twenty-eight million, two hundred eighty-two thousand, eleven".