18818612 has 24 divisors (see below), whose sum is σ = 34728960. Its totient is φ = 8909280.

The previous prime is 18818603. The next prime is 18818629. The reversal of 18818612 is 21681881.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4214 + ... + 7442.

It is an arithmetic number, because the mean of its divisors is an integer number (1447040).

Almost surely, 2^18818612 is an apocalyptic number.

It is an amenable number.

18818612 is a deficient number, since it is larger than the sum of its proper divisors (15910348).

18818612 is a wasteful number, since it uses less digits than its factorization.

18818612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3311 (or 3309 counting only the distinct ones).

The product of its digits is 6144, while the sum is 35.

The square root of 18818612 is about 4338.0424156525. The cubic root of 18818612 is about 265.9882972973.

The spelling of 18818612 in words is "eighteen million, eight hundred eighteen thousand, six hundred twelve".