20331212347 has 2 divisors, whose sum is σ = 20331212348. Its totient is φ = 20331212346.

The previous prime is 20331212311. The next prime is 20331212413. The reversal of 20331212347 is 74321213302.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20331212347 is a prime.

It is not a weakly prime, because it can be changed into another prime (20331212047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165606173 + 10165606174.

It is an arithmetic number, because the mean of its divisors is an integer number (10165606174).

Almost surely, 2^20331212347 is an apocalyptic number.

20331212347 is a deficient number, since it is larger than the sum of its proper divisors (1).

20331212347 is an equidigital number, since it uses as much as digits as its factorization.

20331212347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 28.

Adding to 20331212347 its reverse (74321213302), we get a palindrome (94652425649).

The spelling of 20331212347 in words is "twenty billion, three hundred thirty-one million, two hundred twelve thousand, three hundred forty-seven".