20331343523 has 2 divisors, whose sum is σ = 20331343524. Its totient is φ = 20331343522.

The previous prime is 20331343517. The next prime is 20331343553. The reversal of 20331343523 is 32534313302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20331343523 - 2⁸ = 20331343267 is a prime.

It is not a weakly prime, because it can be changed into another prime (20331343553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165671761 + 10165671762.

It is an arithmetic number, because the mean of its divisors is an integer number (10165671762).

Almost surely, 2^20331343523 is an apocalyptic number.

20331343523 is a deficient number, since it is larger than the sum of its proper divisors (1).

20331343523 is an equidigital number, since it uses as much as digits as its factorization.

20331343523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 29.

Adding to 20331343523 its reverse (32534313302), we get a palindrome (52865656825).

The spelling of 20331343523 in words is "twenty billion, three hundred thirty-one million, three hundred forty-three thousand, five hundred twenty-three".