21460510349 has 2 divisors, whose sum is σ = 21460510350. Its totient is φ = 21460510348.

The previous prime is 21460510343. The next prime is 21460510417. The reversal of 21460510349 is 94301506412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18409605124 + 3050905225 = 135682^2 + 55235^2 .

It is a cyclic number.

It is not a de Polignac number, because 21460510349 - 2⁴ = 21460510333 is a prime.

It is a super-2 number, since 2×21460510349² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21460510343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10730255174 + 10730255175.

It is an arithmetic number, because the mean of its divisors is an integer number (10730255175).

Almost surely, 2^21460510349 is an apocalyptic number.

It is an amenable number.

21460510349 is a deficient number, since it is larger than the sum of its proper divisors (1).

21460510349 is an equidigital number, since it uses as much as digits as its factorization.

21460510349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 21460510349 in words is "twenty-one billion, four hundred sixty million, five hundred ten thousand, three hundred forty-nine".