18071022 has 16 divisors (see below), whose sum is σ = 37119312. Its totient is φ = 5860800.

The previous prime is 18070999. The next prime is 18071087. The reversal of 18071022 is 22017081.

It is a super-2 number, since 2×18071022² = 653123672248968, which contains 22 as substring.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 18071022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40479 + ... + 40922.

It is an arithmetic number, because the mean of its divisors is an integer number (2319957).

Almost surely, 2^18071022 is an apocalyptic number.

18071022 is an abundant number, since it is smaller than the sum of its proper divisors (19048290).

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

18071022 is a wasteful number, since it uses less digits than its factorization.

18071022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81443.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 18071022 is about 4251.0024700063. The cubic root of 18071022 is about 262.4183728057.

Subtracting from 18071022 its sum of digits (21), we obtain a square (18071001 = 4251²).

The spelling of 18071022 in words is "eighteen million, seventy-one thousand, twenty-two".