20213120032013 has 2 divisors, whose sum is σ = 20213120032014. Its totient is φ = 20213120032012.

The previous prime is 20213120031983. The next prime is 20213120032081. The reversal of 20213120032013 is 31023002131202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10398702988804 + 9814417043209 = 3224702^2 + 3132797^2 .

It is a cyclic number.

It is not a de Polignac number, because 20213120032013 - 2¹⁰ = 20213120030989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20213120032513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106560016006 + 10106560016007.

It is an arithmetic number, because the mean of its divisors is an integer number (10106560016007).

Almost surely, 2^{20213120032013} is an apocalyptic number.

It is an amenable number.

20213120032013 is a deficient number, since it is larger than the sum of its proper divisors (1).

20213120032013 is an equidigital number, since it uses as much as digits as its factorization.

20213120032013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20213120032013 its reverse (31023002131202), we get a palindrome (51236122163215).

The spelling of 20213120032013 in words is "twenty trillion, two hundred thirteen billion, one hundred twenty million, thirty-two thousand, thirteen".