1816123422 has 16 divisors (see below), whose sum is σ = 3633615360. Its totient is φ = 605146392.

The previous prime is 1816123403. The next prime is 1816123423. The reversal of 1816123422 is 2243216181.

It is a self number, because there is not a number n which added to its sum of digits gives 1816123422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1816123423) 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, 39348 + ... + 71975.

It is an arithmetic number, because the mean of its divisors is an integer number (227100960).

Almost surely, 2^1816123422 is an apocalyptic number.

1816123422 is an abundant number, since it is smaller than the sum of its proper divisors (1817491938).

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

1816123422 is a wasteful number, since it uses less digits than its factorization.

1816123422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114047.

The product of its digits is 4608, while the sum is 30.

The square root of 1816123422 is about 42615.9996010888. Note that the first 3 decimals coincide. The cubic root of 1816123422 is about 1220.0616787772.

The spelling of 1816123422 in words is "one billion, eight hundred sixteen million, one hundred twenty-three thousand, four hundred twenty-two".