12039447953 has 16 divisors (see below), whose sum is σ = 13108954320. Its totient is φ = 11056526208.

The previous prime is 12039447943. The next prime is 12039447967. The reversal of 12039447953 is 35974493021.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4134104209 + 7905343744 = 64297^2 + 88912^2 .

It is not a de Polignac number, because 12039447953 - 2²⁸ = 11771012497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12039447898 and 12039447907.

It is not an unprimeable number, because it can be changed into a prime (12039447913) 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, 418901 + ... + 446717.

It is an arithmetic number, because the mean of its divisors is an integer number (819309645).

Almost surely, 2^12039447953 is an apocalyptic number.

12039447953 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12039447953 is a deficient number, since it is larger than the sum of its proper divisors (1069506367).

12039447953 is an equidigital number, since it uses as much as digits as its factorization.

12039447953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28053 (or 28027 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 47.

The spelling of 12039447953 in words is "twelve billion, thirty-nine million, four hundred forty-seven thousand, nine hundred fifty-three".