14640382921 has 2 divisors, whose sum is σ = 14640382922. Its totient is φ = 14640382920.

The previous prime is 14640382919. The next prime is 14640382961. The reversal of 14640382921 is 12928304641.

It is an a-pointer prime, because the next prime (14640382961) can be obtained adding 14640382921 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8039632896 + 6600750025 = 89664^2 + 81245^2 .

It is a cyclic number.

It is not a de Polignac number, because 14640382921 - 2¹ = 14640382919 is a prime.

Together with 14640382919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (14640382961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7320191460 + 7320191461.

It is an arithmetic number, because the mean of its divisors is an integer number (7320191461).

Almost surely, 2^14640382921 is an apocalyptic number.

It is an amenable number.

14640382921 is a deficient number, since it is larger than the sum of its proper divisors (1).

14640382921 is an equidigital number, since it uses as much as digits as its factorization.

14640382921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 14640382921 in words is "fourteen billion, six hundred forty million, three hundred eighty-two thousand, nine hundred twenty-one".