1812047412 has 48 divisors (see below), whose sum is σ = 4914040320. Its totient is φ = 508951392.

The previous prime is 1812047407. The next prime is 1812047417. The reversal of 1812047412 is 2147402181.

It is an interprime number because it is at equal distance from previous prime (1812047407) and next prime (1812047417).

It is a self number, because there is not a number n which added to its sum of digits gives 1812047412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812047417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177858 + ... + 187769.

It is an arithmetic number, because the mean of its divisors is an integer number (102375840).

Almost surely, 2^1812047412 is an apocalyptic number.

1812047412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1812047412 is an abundant number, since it is smaller than the sum of its proper divisors (3101992908).

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

1812047412 is a wasteful number, since it uses less digits than its factorization.

1812047412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365700 (or 365698 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 1812047412 is about 42568.1502064630. The cubic root of 1812047412 is about 1219.1482480866.

Adding to 1812047412 its reverse (2147402181), we get a palindrome (3959449593).

The spelling of 1812047412 in words is "one billion, eight hundred twelve million, forty-seven thousand, four hundred twelve".