12020034431 has 4 divisors (see below), whose sum is σ = 12020264664. Its totient is φ = 12019804200.

The previous prime is 12020034421. The next prime is 12020034443. The reversal of 12020034431 is 13443002021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12020034431 - 2¹⁰ = 12020033407 is a prime.

It is a super-2 number, since 2×12020034431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020034421) 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, 4916 + ... + 155126.

It is an arithmetic number, because the mean of its divisors is an integer number (3005066166).

Almost surely, 2^12020034431 is an apocalyptic number.

12020034431 is a deficient number, since it is larger than the sum of its proper divisors (230233).

12020034431 is an equidigital number, since it uses as much as digits as its factorization.

12020034431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230232.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 12020034431 its reverse (13443002021), we get a palindrome (25463036452).

The spelling of 12020034431 in words is "twelve billion, twenty million, thirty-four thousand, four hundred thirty-one".