18192911011 has 16 divisors (see below), whose sum is σ = 20968035840. Its totient is φ = 15628926880.

The previous prime is 18192910987. The next prime is 18192911021. The reversal of 18192911011 is 11011929181.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18192911011 is a prime.

It is a super-2 number, since 2×18192911011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18192911021) 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, 591721 + ... + 621706.

It is an arithmetic number, because the mean of its divisors is an integer number (1310502240).

Almost surely, 2^18192911011 is an apocalyptic number.

18192911011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18192911011 is a deficient number, since it is larger than the sum of its proper divisors (2775124829).

18192911011 is a wasteful number, since it uses less digits than its factorization.

18192911011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213514.

The product of its (nonzero) digits is 1296, while the sum is 34.

The spelling of 18192911011 in words is "eighteen billion, one hundred ninety-two million, nine hundred eleven thousand, eleven".