20852857207 has 16 divisors (see below), whose sum is σ = 25716544000. Its totient is φ = 16465864032.

The previous prime is 20852857159. The next prime is 20852857213. The reversal of 20852857207 is 70275825802.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20852857207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20852857507) 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, 184203 + ... + 275020.

It is an arithmetic number, because the mean of its divisors is an integer number (1607284000).

Almost surely, 2^20852857207 is an apocalyptic number.

20852857207 is a deficient number, since it is larger than the sum of its proper divisors (4863686793).

20852857207 is a wasteful number, since it uses less digits than its factorization.

20852857207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459742.

The product of its (nonzero) digits is 627200, while the sum is 46.

The spelling of 20852857207 in words is "twenty billion, eight hundred fifty-two million, eight hundred fifty-seven thousand, two hundred seven".