18887922 has 48 divisors (see below), whose sum is σ = 43737408. Its totient is φ = 5876640.

The previous prime is 18887861. The next prime is 18887923. The reversal of 18887922 is 22978881.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18887923) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17272 + ... + 18332.

It is an arithmetic number, because the mean of its divisors is an integer number (911196).

Almost surely, 2^18887922 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18887922, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21868704).

18887922 is an abundant number, since it is smaller than the sum of its proper divisors (24849486).

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

18887922 is a wasteful number, since it uses less digits than its factorization.

18887922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135 (or 1132 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 18887922 is about 4346.0236998894. The cubic root of 18887922 is about 266.3144471379.

The spelling of 18887922 in words is "eighteen million, eight hundred eighty-seven thousand, nine hundred twenty-two".