18022948 has 6 divisors (see below), whose sum is σ = 31540166. Its totient is φ = 9011472.

The previous prime is 18022943. The next prime is 18022957. The reversal of 18022948 is 84922081.

It can be written as a sum of positive squares in only one way, i.e., 16957924 + 1065024 = 4118^2 + 1032^2 .

It is a super-2 number, since 2×18022948² = 649653309221408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18022943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2252865 + ... + 2252872.

Almost surely, 2^18022948 is an apocalyptic number.

It is an amenable number.

18022948 is a deficient number, since it is larger than the sum of its proper divisors (13517218).

18022948 is a wasteful number, since it uses less digits than its factorization.

18022948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4505741 (or 4505739 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 18022948 is about 4245.3442734365. The cubic root of 18022948 is about 262.1854639283.

The spelling of 18022948 in words is "eighteen million, twenty-two thousand, nine hundred forty-eight".