20331501338513 has 2 divisors, whose sum is σ = 20331501338514. Its totient is φ = 20331501338512.

The previous prime is 20331501338399. The next prime is 20331501338569. The reversal of 20331501338513 is 31583310513302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10762520074384 + 9568981264129 = 3280628^2 + 3093377^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20331501338513 is a prime.

It is not a weakly prime, because it can be changed into another prime (20331501331513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165750669256 + 10165750669257.

It is an arithmetic number, because the mean of its divisors is an integer number (10165750669257).

Almost surely, 2^{20331501338513} is an apocalyptic number.

It is an amenable number.

20331501338513 is a deficient number, since it is larger than the sum of its proper divisors (1).

20331501338513 is an equidigital number, since it uses as much as digits as its factorization.

20331501338513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 38.

The spelling of 20331501338513 in words is "twenty trillion, three hundred thirty-one billion, five hundred one million, three hundred thirty-eight thousand, five hundred thirteen".