12047155947 has 32 divisors (see below), whose sum is σ = 18641203200. Its totient is φ = 7674993216.

The previous prime is 12047155943. The next prime is 12047155997. The reversal of 12047155947 is 74955174021.

12047155947 is a `hidden beast` number, since 1 + 2 + 0 + 47 + 15 + 594 + 7 = 666.

It is not a de Polignac number, because 12047155947 - 2² = 12047155943 is a prime.

It is a super-2 number, since 2×12047155947² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12047155943) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 692518 + ... + 709700.

It is an arithmetic number, because the mean of its divisors is an integer number (582537600).

Almost surely, 2^12047155947 is an apocalyptic number.

12047155947 is a deficient number, since it is larger than the sum of its proper divisors (6594047253).

12047155947 is a wasteful number, since it uses less digits than its factorization.

12047155947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18344 (or 18338 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 45.

The spelling of 12047155947 in words is "twelve billion, forty-seven million, one hundred fifty-five thousand, nine hundred forty-seven".