20413335463621 has 2 divisors, whose sum is σ = 20413335463622. Its totient is φ = 20413335463620.

The previous prime is 20413335463583. The next prime is 20413335463649. The reversal of 20413335463621 is 12636453331402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14945291055396 + 5468044408225 = 3865914^2 + 2338385^2 .

It is a cyclic number.

It is not a de Polignac number, because 20413335463621 - 2²¹ = 20413333366469 is a prime.

It is a super-4 number, since 4×20413335463621⁴ (a number of 54 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20413335463121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10206667731810 + 10206667731811.

It is an arithmetic number, because the mean of its divisors is an integer number (10206667731811).

Almost surely, 2^{20413335463621} is an apocalyptic number.

It is an amenable number.

20413335463621 is a deficient number, since it is larger than the sum of its proper divisors (1).

20413335463621 is an equidigital number, since it uses as much as digits as its factorization.

20413335463621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 933120, while the sum is 43.

The spelling of 20413335463621 in words is "twenty trillion, four hundred thirteen billion, three hundred thirty-five million, four hundred sixty-three thousand, six hundred twenty-one".