18011627106 has 128 divisors (see below), whose sum is σ = 43274649600. Its totient is φ = 4933431360.

The previous prime is 18011627027. The next prime is 18011627131. The reversal of 18011627106 is 60172611081.

It is a happy number.

It is a super-2 number, since 2×18011627106² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20967705 + ... + 20968563.

It is an arithmetic number, because the mean of its divisors is an integer number (338083200).

Almost surely, 2^18011627106 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18011627106, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21637324800).

18011627106 is an abundant number, since it is smaller than the sum of its proper divisors (25263022494).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18011627106 is a wasteful number, since it uses less digits than its factorization.

18011627106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644.

The product of its (nonzero) digits is 4032, while the sum is 33.

The spelling of 18011627106 in words is "eighteen billion, eleven million, six hundred twenty-seven thousand, one hundred six".