1811013012 has 24 divisors (see below), whose sum is σ = 4695219200. Its totient is φ = 603670968.

The previous prime is 1811013011. The next prime is 1811013013. The reversal of 1811013012 is 2103101181.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1811013011) and next prime (1811013013).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1811013011) 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 7 ways as a sum of consecutive naturals, for example, 8384212 + ... + 8384427.

Almost surely, 2^1811013012 is an apocalyptic number.

1811013012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1811013012 is an abundant number, since it is smaller than the sum of its proper divisors (2884206188).

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

1811013012 is a wasteful number, since it uses less digits than its factorization.

1811013012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16768652 (or 16768644 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

The square root of 1811013012 is about 42555.9985430961. The cubic root of 1811013012 is about 1218.9162219675.

Adding to 1811013012 its reverse (2103101181), we get a palindrome (3914114193).

The spelling of 1811013012 in words is "one billion, eight hundred eleven million, thirteen thousand, twelve".