1819807012 has 24 divisors (see below), whose sum is σ = 3430328832. Its totient is φ = 842265600.

The previous prime is 1819806979. The next prime is 1819807013. The reversal of 1819807012 is 2107089181.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1819807013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316189 + ... + 321892.

It is an arithmetic number, because the mean of its divisors is an integer number (142930368).

Almost surely, 2^1819807012 is an apocalyptic number.

It is an amenable number.

1819807012 is a deficient number, since it is larger than the sum of its proper divisors (1610521820).

1819807012 is a wasteful number, since it uses less digits than its factorization.

1819807012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638139 (or 638137 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 37.

The square root of 1819807012 is about 42659.1961011925. The cubic root of 1819807012 is about 1220.8859935190.

The spelling of 1819807012 in words is "one billion, eight hundred nineteen million, eight hundred seven thousand, twelve".