20606583281 has 8 divisors (see below), whose sum is σ = 21095991840. Its totient is φ = 20117637792.

The previous prime is 20606583259. The next prime is 20606583293. The reversal of 20606583281 is 18238560602.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20606583281 is a prime.

It is a super-2 number, since 2×20606583281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20606583211) 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, 24875 + ... + 204528.

It is an arithmetic number, because the mean of its divisors is an integer number (2636998980).

Almost surely, 2^20606583281 is an apocalyptic number.

It is an amenable number.

20606583281 is a deficient number, since it is larger than the sum of its proper divisors (489408559).

20606583281 is a wasteful number, since it uses less digits than its factorization.

20606583281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231535.

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 20606583281 in words is "twenty billion, six hundred six million, five hundred eighty-three thousand, two hundred eighty-one".