18712322 has 16 divisors (see below), whose sum is σ = 28689120. Its totient is φ = 9151008.

The previous prime is 18712303. The next prime is 18712327. The reversal of 18712322 is 22321781.

It is a junction number, because it is equal to n+sod(n) for n = 18712291 and 18712300.

It is not an unprimeable number, because it can be changed into a prime (18712327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40718 + ... + 41174.

It is an arithmetic number, because the mean of its divisors is an integer number (1793070).

Almost surely, 2^18712322 is an apocalyptic number.

18712322 is a deficient number, since it is larger than the sum of its proper divisors (9976798).

18712322 is a wasteful number, since it uses less digits than its factorization.

18712322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865.

The product of its digits is 1344, while the sum is 26.

The square root of 18712322 is about 4325.7741503689. The cubic root of 18712322 is about 265.4865725231.

The spelling of 18712322 in words is "eighteen million, seven hundred twelve thousand, three hundred twenty-two".