12812947533 has 12 divisors (see below), whose sum is σ = 19145784060. Its totient is φ = 8247414336.

The previous prime is 12812947457. The next prime is 12812947601. The reversal of 12812947533 is 33574921821.

It is a happy number.

12812947533 is a `hidden beast` number, since 1 + 28 + 1 + 2 + 94 + 7 + 533 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6012141444 + 6800806089 = 77538^2 + 82467^2 .

It is not a de Polignac number, because 12812947533 - 2¹⁷ = 12812816461 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12812947333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24545616 + ... + 24546137.

It is an arithmetic number, because the mean of its divisors is an integer number (1595482005).

Almost surely, 2^12812947533 is an apocalyptic number.

It is an amenable number.

12812947533 is a deficient number, since it is larger than the sum of its proper divisors (6332836527).

12812947533 is a wasteful number, since it uses less digits than its factorization.

12812947533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49091788 (or 49091785 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The spelling of 12812947533 in words is "twelve billion, eight hundred twelve million, nine hundred forty-seven thousand, five hundred thirty-three".