21400410413 has 2 divisors, whose sum is σ = 21400410414. Its totient is φ = 21400410412.

The previous prime is 21400410403. The next prime is 21400410431. The reversal of 21400410413 is 31401400412.

Together with next prime (21400410431) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12493203529 + 8907206884 = 111773^2 + 94378^2 .

It is a cyclic number.

It is not a de Polignac number, because 21400410413 - 2¹² = 21400406317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21400410403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10700205206 + 10700205207.

It is an arithmetic number, because the mean of its divisors is an integer number (10700205207).

Almost surely, 2^21400410413 is an apocalyptic number.

It is an amenable number.

21400410413 is a deficient number, since it is larger than the sum of its proper divisors (1).

21400410413 is an equidigital number, since it uses as much as digits as its factorization.

21400410413 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 20.

Adding to 21400410413 its reverse (31401400412), we get a palindrome (52801810825).

The spelling of 21400410413 in words is "twenty-one billion, four hundred million, four hundred ten thousand, four hundred thirteen".