21460413277 has 2 divisors, whose sum is σ = 21460413278. Its totient is φ = 21460413276.

The previous prime is 21460413263. The next prime is 21460413311. The reversal of 21460413277 is 77231406412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16227192996 + 5233220281 = 127386^2 + 72341^2 .

It is a cyclic number.

It is not a de Polignac number, because 21460413277 - 2¹¹ = 21460411229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21460413977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10730206638 + 10730206639.

It is an arithmetic number, because the mean of its divisors is an integer number (10730206639).

Almost surely, 2^21460413277 is an apocalyptic number.

It is an amenable number.

21460413277 is a deficient number, since it is larger than the sum of its proper divisors (1).

21460413277 is an equidigital number, since it uses as much as digits as its factorization.

21460413277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 37.

Adding to 21460413277 its reverse (77231406412), we get a palindrome (98691819689).

The spelling of 21460413277 in words is "twenty-one billion, four hundred sixty million, four hundred thirteen thousand, two hundred seventy-seven".