21414413413 has 2 divisors, whose sum is σ = 21414413414. Its totient is φ = 21414413412.

The previous prime is 21414413393. The next prime is 21414413431. The reversal of 21414413413 is 31431441412.

Together with next prime (21414413431) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11522519649 + 9891893764 = 107343^2 + 99458^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21414413413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31414413413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10707206706 + 10707206707.

It is an arithmetic number, because the mean of its divisors is an integer number (10707206707).

Almost surely, 2^21414413413 is an apocalyptic number.

It is an amenable number.

21414413413 is a deficient number, since it is larger than the sum of its proper divisors (1).

21414413413 is an equidigital number, since it uses as much as digits as its factorization.

21414413413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 28.

Adding to 21414413413 its reverse (31431441412), we get a palindrome (52845854825).

The spelling of 21414413413 in words is "twenty-one billion, four hundred fourteen million, four hundred thirteen thousand, four hundred thirteen".