12017947457 has 4 divisors (see below), whose sum is σ = 12091677360. Its totient is φ = 11944217556.

The previous prime is 12017947453. The next prime is 12017947463. The reversal of 12017947457 is 75474971021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75474971021 = 53 ⋅1424056057.

It is a cyclic number.

It is not a de Polignac number, because 12017947457 - 2² = 12017947453 is a prime.

It is a super-2 number, since 2×12017947457² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12017947453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36864707 + ... + 36865032.

It is an arithmetic number, because the mean of its divisors is an integer number (3022919340).

Almost surely, 2^12017947457 is an apocalyptic number.

It is an amenable number.

12017947457 is a deficient number, since it is larger than the sum of its proper divisors (73729903).

12017947457 is an equidigital number, since it uses as much as digits as its factorization.

12017947457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73729902.

The product of its (nonzero) digits is 493920, while the sum is 47.

The spelling of 12017947457 in words is "twelve billion, seventeen million, nine hundred forty-seven thousand, four hundred fifty-seven".