21046407607313 has 6 divisors (see below), whose sum is σ = 23133654642882. Its totient is φ = 19133097824720.

The previous prime is 21046407607307. The next prime is 21046407607319. The reversal of 21046407607313 is 31370670464012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21046407607307) and next prime (21046407607319).

It can be written as a sum of positive squares in only one way, i.e., 21045917781889 + 489825424 = 4587583^2 + 22132^2 .

It is not a de Polignac number, because 21046407607313 - 2⁴ = 21046407607297 is a prime.

It is a super-2 number, since 2×21046407607313² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21046407607319) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 86968626356 + ... + 86968626597.

It is an arithmetic number, because the mean of its divisors is an integer number (3855609107147).

Almost surely, 2^{21046407607313} is an apocalyptic number.

It is an amenable number.

21046407607313 is a deficient number, since it is larger than the sum of its proper divisors (2087247035569).

21046407607313 is a wasteful number, since it uses less digits than its factorization.

21046407607313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173937252975 (or 173937252964 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 44.

The spelling of 21046407607313 in words is "twenty-one trillion, forty-six billion, four hundred seven million, six hundred seven thousand, three hundred thirteen".