21306345201 has 12 divisors (see below), whose sum is σ = 30997242640. Its totient is φ = 14102040600.

The previous prime is 21306345173. The next prime is 21306345217. The reversal of 21306345201 is 10254360312.

21306345201 is a `hidden beast` number, since 2 + 1 + 3 + 0 + 634 + 5 + 20 + 1 = 666.

It is not a de Polignac number, because 21306345201 - 2¹³ = 21306337009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21306345271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8514475 + ... + 8516976.

Almost surely, 2^21306345201 is an apocalyptic number.

It is an amenable number.

21306345201 is a deficient number, since it is larger than the sum of its proper divisors (9690897439).

21306345201 is a wasteful number, since it uses less digits than its factorization.

21306345201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17031596 (or 17031593 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The spelling of 21306345201 in words is "twenty-one billion, three hundred six million, three hundred forty-five thousand, two hundred one".