12007421547 has 32 divisors (see below), whose sum is σ = 17699345664. Its totient is φ = 7180185600.

The previous prime is 12007421533. The next prime is 12007421599. The reversal of 12007421547 is 74512470021.

It is not a de Polignac number, because 12007421547 - 2⁸ = 12007421291 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (12007421047) 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, 1073172 + ... + 1084302.

It is an arithmetic number, because the mean of its divisors is an integer number (553104552).

Almost surely, 2^12007421547 is an apocalyptic number.

12007421547 is a deficient number, since it is larger than the sum of its proper divisors (5691924117).

12007421547 is a wasteful number, since it uses less digits than its factorization.

12007421547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11579.

The product of its (nonzero) digits is 15680, while the sum is 33.

Adding to 12007421547 its reverse (74512470021), we get a palindrome (86519891568).

The spelling of 12007421547 in words is "twelve billion, seven million, four hundred twenty-one thousand, five hundred forty-seven".