21301401413 has 4 divisors (see below), whose sum is σ = 21351998988. Its totient is φ = 21250803840.

The previous prime is 21301401403. The next prime is 21301401437. The reversal of 21301401413 is 31410410312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5015047489 + 16286353924 = 70817^2 + 127618^2 .

It is a cyclic number.

It is not a de Polignac number, because 21301401413 - 2⁸ = 21301401157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21301401403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25298156 + ... + 25298997.

It is an arithmetic number, because the mean of its divisors is an integer number (5337999747).

Almost surely, 2^21301401413 is an apocalyptic number.

It is an amenable number.

21301401413 is a deficient number, since it is larger than the sum of its proper divisors (50597575).

21301401413 is an equidigital number, since it uses as much as digits as its factorization.

21301401413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50597574.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21301401413 its reverse (31410410312), we get a palindrome (52711811725).

The spelling of 21301401413 in words is "twenty-one billion, three hundred one million, four hundred one thousand, four hundred thirteen".