18222736 has 20 divisors (see below), whose sum is σ = 40350592. Its totient is φ = 7809696.

The previous prime is 18222731. The next prime is 18222749. The reversal of 18222736 is 63722281.

It is a junction number, because it is equal to n+sod(n) for n = 18222698 and 18222707.

It is not an unprimeable number, because it can be changed into a prime (18222731) 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, 81240 + ... + 81463.

Almost surely, 2^18222736 is an apocalyptic number.

18222736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18222736 is an abundant number, since it is smaller than the sum of its proper divisors (22127856).

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

18222736 is a wasteful number, since it uses less digits than its factorization.

18222736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162718 (or 162712 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 18222736 is about 4268.8096701540. The cubic root of 18222736 is about 263.1506989078.

The spelling of 18222736 in words is "eighteen million, two hundred twenty-two thousand, seven hundred thirty-six".