20410213081 has 2 divisors, whose sum is σ = 20410213082. Its totient is φ = 20410213080.

The previous prime is 20410213069. The next prime is 20410213129. The reversal of 20410213081 is 18031201402.

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., 19961451225 + 448761856 = 141285^2 + 21184^2 .

It is a cyclic number.

It is not a de Polignac number, because 20410213081 - 2²⁵ = 20376658649 is a prime.

It is a super-2 number, since 2×20410213081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20410213181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10205106540 + 10205106541.

It is an arithmetic number, because the mean of its divisors is an integer number (10205106541).

Almost surely, 2^20410213081 is an apocalyptic number.

It is an amenable number.

20410213081 is a deficient number, since it is larger than the sum of its proper divisors (1).

20410213081 is an equidigital number, since it uses as much as digits as its factorization.

20410213081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 20410213081 its reverse (18031201402), we get a palindrome (38441414483).

The spelling of 20410213081 in words is "twenty billion, four hundred ten million, two hundred thirteen thousand, eighty-one".