20864880461 has 8 divisors (see below), whose sum is σ = 20894193600. Its totient is φ = 20835590688.

The previous prime is 20864880437. The next prime is 20864880467. The reversal of 20864880461 is 16408846802.

It is a happy number.

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 20864880461 - 2⁶ = 20864880397 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 (20864880467) 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, 2439785 + ... + 2448321.

It is an arithmetic number, because the mean of its divisors is an integer number (2611774200).

Almost surely, 2^20864880461 is an apocalyptic number.

It is an amenable number.

20864880461 is a deficient number, since it is larger than the sum of its proper divisors (29313139).

20864880461 is a wasteful number, since it uses less digits than its factorization.

20864880461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11683.

The product of its (nonzero) digits is 589824, while the sum is 47.

The spelling of 20864880461 in words is "twenty billion, eight hundred sixty-four million, eight hundred eighty thousand, four hundred sixty-one".