18532722 has 32 divisors (see below), whose sum is σ = 40678848. Its totient is φ = 5593536.

The previous prime is 18532681. The next prime is 18532727. The reversal of 18532722 is 22723581.

It is a self number, because there is not a number n which added to its sum of digits gives 18532722.

It is not an unprimeable number, because it can be changed into a prime (18532727) 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, 1893 + ... + 6375.

It is an arithmetic number, because the mean of its divisors is an integer number (1271214).

Almost surely, 2^18532722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18532722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20339424).

18532722 is an abundant number, since it is smaller than the sum of its proper divisors (22146126).

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

18532722 is a wasteful number, since it uses less digits than its factorization.

18532722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4554.

The product of its digits is 6720, while the sum is 30.

The square root of 18532722 is about 4304.9648082185. The cubic root of 18532722 is about 264.6344645734.

The spelling of 18532722 in words is "eighteen million, five hundred thirty-two thousand, seven hundred twenty-two".