21350325313 has 16 divisors (see below), whose sum is σ = 22992684624. Its totient is φ = 19751362560.

The previous prime is 21350325247. The next prime is 21350325317. The reversal of 21350325313 is 31352305312.

It can be written as a sum of positive squares in 8 ways, for example, as 927628849 + 20422696464 = 30457^2 + 142908^2 .

It is a cyclic number.

It is not a de Polignac number, because 21350325313 - 2²⁹ = 20813454401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21350325317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1691281 + ... + 1703857.

It is an arithmetic number, because the mean of its divisors is an integer number (1437042789).

Almost surely, 2^21350325313 is an apocalyptic number.

It is an amenable number.

21350325313 is a deficient number, since it is larger than the sum of its proper divisors (1642359311).

21350325313 is a wasteful number, since it uses less digits than its factorization.

21350325313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14292.

The product of its (nonzero) digits is 8100, while the sum is 28.

The spelling of 21350325313 in words is "twenty-one billion, three hundred fifty million, three hundred twenty-five thousand, three hundred thirteen".