20952408161 has 16 divisors (see below), whose sum is σ = 21486124800. Its totient is φ = 20425456320.

The previous prime is 20952408143. The next prime is 20952408163. The reversal of 20952408161 is 16180425902.

It is a cyclic number.

It is not a de Polignac number, because 20952408161 - 2²² = 20948213857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20952408163) 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, 4569476 + ... + 4574058.

It is an arithmetic number, because the mean of its divisors is an integer number (1342882800).

Almost surely, 2^20952408161 is an apocalyptic number.

It is an amenable number.

20952408161 is a deficient number, since it is larger than the sum of its proper divisors (533716639).

20952408161 is a wasteful number, since it uses less digits than its factorization.

20952408161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5296.

The product of its (nonzero) digits is 34560, while the sum is 38.

The spelling of 20952408161 in words is "twenty billion, nine hundred fifty-two million, four hundred eight thousand, one hundred sixty-one".