18622008 has 64 divisors (see below), whose sum is σ = 52480800. Its totient is φ = 6117120.

The previous prime is 18622001. The next prime is 18622013. The reversal of 18622008 is 80022681.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18622001) 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, 15178 + ... + 16358.

Almost surely, 2^18622008 is an apocalyptic number.

18622008 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18622008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26240400).

18622008 is an abundant number, since it is smaller than the sum of its proper divisors (33858792).

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

18622008 is a wasteful number, since it uses less digits than its factorization.

18622008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269 (or 1259 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 18622008 is about 4315.3224676726. The cubic root of 18622008 is about 265.0587647060.

Adding to 18622008 its reverse (80022681), we get a palindrome (98644689).

The spelling of 18622008 in words is "eighteen million, six hundred twenty-two thousand, eight".