20312202439 has 4 divisors (see below), whose sum is σ = 20381527656. Its totient is φ = 20242877224.

The previous prime is 20312202433. The next prime is 20312202481. The reversal of 20312202439 is 93420221302.

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 20312202439 - 2¹³ = 20312194247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312202433) 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, 34662169 + ... + 34662754.

It is an arithmetic number, because the mean of its divisors is an integer number (5095381914).

Almost surely, 2^20312202439 is an apocalyptic number.

20312202439 is a deficient number, since it is larger than the sum of its proper divisors (69325217).

20312202439 is an equidigital number, since it uses as much as digits as its factorization.

20312202439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69325216.

The product of its (nonzero) digits is 5184, while the sum is 28.

The spelling of 20312202439 in words is "twenty billion, three hundred twelve million, two hundred two thousand, four hundred thirty-nine".