1918573822 has 48 divisors (see below), whose sum is σ = 3293952480. Its totient is φ = 836454080.

The previous prime is 1918573807. The next prime is 1918573829. The reversal of 1918573822 is 2283758191.

It is a happy number.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918573829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1171188 + ... + 1172824.

It is an arithmetic number, because the mean of its divisors is an integer number (68624010).

Almost surely, 2^1918573822 is an apocalyptic number.

1918573822 is a deficient number, since it is larger than the sum of its proper divisors (1375378658).

1918573822 is a wasteful number, since it uses less digits than its factorization.

1918573822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1857 (or 1846 counting only the distinct ones).

The product of its digits is 241920, while the sum is 46.

The square root of 1918573822 is about 43801.5276217622. The cubic root of 1918573822 is about 1242.5851854144.

The spelling of 1918573822 in words is "one billion, nine hundred eighteen million, five hundred seventy-three thousand, eight hundred twenty-two".