20560223406 has 16 divisors (see below), whose sum is σ = 41358139344. Its totient is φ = 6813792384.

The previous prime is 20560223371. The next prime is 20560223407. The reversal of 20560223406 is 60432206502.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20560223407) 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, 9902731 + ... + 9904806.

It is an arithmetic number, because the mean of its divisors is an integer number (2584883709).

Almost surely, 2^20560223406 is an apocalyptic number.

20560223406 is an abundant number, since it is smaller than the sum of its proper divisors (20797915938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20560223406 is a wasteful number, since it uses less digits than its factorization.

20560223406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19807715.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 20560223406 its reverse (60432206502), we get a palindrome (80992429908).

The spelling of 20560223406 in words is "twenty billion, five hundred sixty million, two hundred twenty-three thousand, four hundred six".