1812021422 has 8 divisors (see below), whose sum is σ = 2718733296. Its totient is φ = 905776992.

The previous prime is 1812021377. The next prime is 1812021427. The reversal of 1812021422 is 2241202181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×1812021422³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812021427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107003 + ... + 122774.

It is an arithmetic number, because the mean of its divisors is an integer number (339841662).

Almost surely, 2^1812021422 is an apocalyptic number.

1812021422 is a deficient number, since it is larger than the sum of its proper divisors (906711874).

1812021422 is a wasteful number, since it uses less digits than its factorization.

1812021422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233722.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 1812021422 is about 42567.8449301817. The cubic root of 1812021422 is about 1219.1424193549.

The spelling of 1812021422 in words is "one billion, eight hundred twelve million, twenty-one thousand, four hundred twenty-two".