21414274249 has 2 divisors, whose sum is σ = 21414274250. Its totient is φ = 21414274248.

The previous prime is 21414274199. The next prime is 21414274289. The reversal of 21414274249 is 94247241412.

It is a happy number.

It is an a-pointer prime, because the next prime (21414274289) can be obtained adding 21414274249 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12782563600 + 8631710649 = 113060^2 + 92907^2 .

It is a cyclic number.

It is not a de Polignac number, because 21414274249 - 2¹³ = 21414266057 is a prime.

It is a super-2 number, since 2×21414274249² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21414274289) 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 as a sum of consecutive naturals, namely, 10707137124 + 10707137125.

It is an arithmetic number, because the mean of its divisors is an integer number (10707137125).

Almost surely, 2^21414274249 is an apocalyptic number.

It is an amenable number.

21414274249 is a deficient number, since it is larger than the sum of its proper divisors (1).

21414274249 is an equidigital number, since it uses as much as digits as its factorization.

21414274249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 40.

The spelling of 21414274249 in words is "twenty-one billion, four hundred fourteen million, two hundred seventy-four thousand, two hundred forty-nine".