20941808261 has 8 divisors (see below), whose sum is σ = 22856305248. Its totient is φ = 19029094000.

The previous prime is 20941808203. The next prime is 20941808263. The reversal of 20941808261 is 16280814902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20941808261 - 2⁶ = 20941808197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20941808263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 421055 + ... + 468156.

It is an arithmetic number, because the mean of its divisors is an integer number (2857038156).

Almost surely, 2^20941808261 is an apocalyptic number.

It is an amenable number.

20941808261 is a deficient number, since it is larger than the sum of its proper divisors (1914496987).

20941808261 is a wasteful number, since it uses less digits than its factorization.

20941808261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891363.

The product of its (nonzero) digits is 55296, while the sum is 41.

The spelling of 20941808261 in words is "twenty billion, nine hundred forty-one million, eight hundred eight thousand, two hundred sixty-one".