10420421449 has 2 divisors, whose sum is σ = 10420421450. Its totient is φ = 10420421448.

The previous prime is 10420421393. The next prime is 10420421477. The reversal of 10420421449 is 94412402401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10354487049 + 65934400 = 101757^2 + 8120^2 .

It is an emirp because it is prime and its reverse (94412402401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10420421449 - 2⁷ = 10420421321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10420421449.

It is not a weakly prime, because it can be changed into another prime (10420421149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5210210724 + 5210210725.

It is an arithmetic number, because the mean of its divisors is an integer number (5210210725).

Almost surely, 2^10420421449 is an apocalyptic number.

It is an amenable number.

10420421449 is a deficient number, since it is larger than the sum of its proper divisors (1).

10420421449 is an equidigital number, since it uses as much as digits as its factorization.

10420421449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 31.

The spelling of 10420421449 in words is "ten billion, four hundred twenty million, four hundred twenty-one thousand, four hundred forty-nine".