18646917322 has 32 divisors (see below), whose sum is σ = 31511462400. Its totient is φ = 8198803200.

The previous prime is 18646917299. The next prime is 18646917329. The reversal of 18646917322 is 22371964681.

It is a happy number.

It is a super-2 number, since 2×18646917322² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18646917329) 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, 2020254 + ... + 2029462.

It is an arithmetic number, because the mean of its divisors is an integer number (984733200).

Almost surely, 2^18646917322 is an apocalyptic number.

18646917322 is a deficient number, since it is larger than the sum of its proper divisors (12864545078).

18646917322 is a wasteful number, since it uses less digits than its factorization.

18646917322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12222.

The product of its digits is 870912, while the sum is 49.

The spelling of 18646917322 in words is "eighteen billion, six hundred forty-six million, nine hundred seventeen thousand, three hundred twenty-two".