20410021013 has 2 divisors, whose sum is σ = 20410021014. Its totient is φ = 20410021012.

The previous prime is 20410020959. The next prime is 20410021019. The reversal of 20410021013 is 31012001402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12324774289 + 8085246724 = 111017^2 + 89918^2 .

It is a cyclic number.

It is not a de Polignac number, because 20410021013 - 2¹⁰ = 20410019989 is a prime.

It is a super-2 number, since 2×20410021013² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20410021019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10205010506 + 10205010507.

It is an arithmetic number, because the mean of its divisors is an integer number (10205010507).

Almost surely, 2^20410021013 is an apocalyptic number.

It is an amenable number.

20410021013 is a deficient number, since it is larger than the sum of its proper divisors (1).

20410021013 is an equidigital number, since it uses as much as digits as its factorization.

20410021013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20410021013 its reverse (31012001402), we get a palindrome (51422022415).

The spelling of 20410021013 in words is "twenty billion, four hundred ten million, twenty-one thousand, thirteen".