2020521913 has 2 divisors, whose sum is σ = 2020521914. Its totient is φ = 2020521912.

The previous prime is 2020521907. The next prime is 2020521941. The reversal of 2020521913 is 3191250202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1791998224 + 228523689 = 42332^2 + 15117^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020521913 - 2²⁵ = 1986967481 is a prime.

It is not a weakly prime, because it can be changed into another prime (2020527913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010260956 + 1010260957.

It is an arithmetic number, because the mean of its divisors is an integer number (1010260957).

Almost surely, 2^2020521913 is an apocalyptic number.

It is an amenable number.

2020521913 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020521913 is an equidigital number, since it uses as much as digits as its factorization.

2020521913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 2020521913 is about 44950.2159394146. The cubic root of 2020521913 is about 1264.2157257533.

The spelling of 2020521913 in words is "two billion, twenty million, five hundred twenty-one thousand, nine hundred thirteen".