18322418 has 8 divisors (see below), whose sum is σ = 28002348. Its totient is φ = 8988304.

The previous prime is 18322411. The next prime is 18322453. The reversal of 18322418 is 81422381.

It can be written as a sum of positive squares in 2 ways, for example, as 17749369 + 573049 = 4213^2 + 757^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×18322418² = 671422002733448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18322411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86321 + ... + 86532.

Almost surely, 2^18322418 is an apocalyptic number.

18322418 is a deficient number, since it is larger than the sum of its proper divisors (9679930).

18322418 is a wasteful number, since it uses less digits than its factorization.

18322418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172908.

The product of its digits is 3072, while the sum is 29.

The square root of 18322418 is about 4280.4693667868. The cubic root of 18322418 is about 263.6296555710.

Adding to 18322418 its reverse (81422381), we get a palindrome (99744799).

It can be divided in two parts, 1832 and 2418, that multiplied together give a triangular number (4429776 = T₂₉₇₆).

The spelling of 18322418 in words is "eighteen million, three hundred twenty-two thousand, four hundred eighteen".