22018473 has 36 divisors (see below), whose sum is σ = 34948368. Its totient is φ = 13851000.

The previous prime is 22018471. The next prime is 22018481. The reversal of 22018473 is 37481022.

It is not a de Polignac number, because 22018473 - 2¹ = 22018471 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22018471) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 87598 + ... + 87848.

It is an arithmetic number, because the mean of its divisors is an integer number (970788).

Almost surely, 2^22018473 is an apocalyptic number.

It is an amenable number.

22018473 is a deficient number, since it is larger than the sum of its proper divisors (12929895).

22018473 is an equidigital number, since it uses as much as digits as its factorization.

22018473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304 (or 273 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 22018473 is about 4692.3845750322. The cubic root of 22018473 is about 280.2823385071.

Adding to 22018473 its reverse (37481022), we get a palindrome (59499495).

The spelling of 22018473 in words is "twenty-two million, eighteen thousand, four hundred seventy-three".