20015055013 has 2 divisors, whose sum is σ = 20015055014. Its totient is φ = 20015055012.

The previous prime is 20015055007. The next prime is 20015055037. The reversal of 20015055013 is 31055051002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14805535684 + 5209519329 = 121678^2 + 72177^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20015055013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20015055083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10007527506 + 10007527507.

It is an arithmetic number, because the mean of its divisors is an integer number (10007527507).

Almost surely, 2^20015055013 is an apocalyptic number.

It is an amenable number.

20015055013 is a deficient number, since it is larger than the sum of its proper divisors (1).

20015055013 is an equidigital number, since it uses as much as digits as its factorization.

20015055013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 750, while the sum is 22.

The spelling of 20015055013 in words is "twenty billion, fifteen million, fifty-five thousand, thirteen".