21514414024357 has 2 divisors, whose sum is σ = 21514414024358. Its totient is φ = 21514414024356.

The previous prime is 21514414024247. The next prime is 21514414024379. The reversal of 21514414024357 is 75342041441512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13759715129281 + 7754698895076 = 3709409^2 + 2784726^2 .

It is a cyclic number.

It is not a de Polignac number, because 21514414024357 - 2¹⁵ = 21514413991589 is a prime.

It is a super-2 number, since 2×21514414024357² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21514414024387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10757207012178 + 10757207012179.

It is an arithmetic number, because the mean of its divisors is an integer number (10757207012179).

Almost surely, 2^{21514414024357} is an apocalyptic number.

It is an amenable number.

21514414024357 is a deficient number, since it is larger than the sum of its proper divisors (1).

21514414024357 is an equidigital number, since it uses as much as digits as its factorization.

21514414024357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 537600, while the sum is 43.

Adding to 21514414024357 its reverse (75342041441512), we get a palindrome (96856455465869).

The spelling of 21514414024357 in words is "twenty-one trillion, five hundred fourteen billion, four hundred fourteen million, twenty-four thousand, three hundred fifty-seven".