1812421012 has 12 divisors (see below), whose sum is σ = 3199806036. Its totient is φ = 898190720.

The previous prime is 1812420919. The next prime is 1812421027. The reversal of 1812421012 is 2101242181.

It can be written as a sum of positive squares in 2 ways, for example, as 701932036 + 1110488976 = 26494^2 + 33324^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2004439 + ... + 2005342.

It is an arithmetic number, because the mean of its divisors is an integer number (266650503).

Almost surely, 2^1812421012 is an apocalyptic number.

It is an amenable number.

1812421012 is a deficient number, since it is larger than the sum of its proper divisors (1387385024).

1812421012 is a wasteful number, since it uses less digits than its factorization.

1812421012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4009898 (or 4009896 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 1812421012 is about 42572.5382376950. The cubic root of 1812421012 is about 1219.2320285446.

Adding to 1812421012 its reverse (2101242181), we get a palindrome (3913663193).

The spelling of 1812421012 in words is "one billion, eight hundred twelve million, four hundred twenty-one thousand, twelve".