20426422566 has 32 divisors (see below), whose sum is σ = 44612967168. Its totient is φ = 6183404640.

The previous prime is 20426422553. The next prime is 20426422579. The reversal of 20426422566 is 66522462402.

It is an interprime number because it is at equal distance from previous prime (20426422553) and next prime (20426422579).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96205 + ... + 223848.

It is an arithmetic number, because the mean of its divisors is an integer number (1394155224).

Almost surely, 2^20426422566 is an apocalyptic number.

20426422566 is an abundant number, since it is smaller than the sum of its proper divisors (24186544602).

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

20426422566 is a wasteful number, since it uses less digits than its factorization.

20426422566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321036.

The product of its (nonzero) digits is 276480, while the sum is 39.

Adding to 20426422566 its reverse (66522462402), we get a palindrome (86948884968).

The spelling of 20426422566 in words is "twenty billion, four hundred twenty-six million, four hundred twenty-two thousand, five hundred sixty-six".