20426642224 has 10 divisors (see below), whose sum is σ = 39576619340. Its totient is φ = 10213321104.

The previous prime is 20426642221. The next prime is 20426642239. The reversal of 20426642224 is 42224662402.

It is a self number, because there is not a number n which added to its sum of digits gives 20426642224.

It is not an unprimeable number, because it can be changed into a prime (20426642221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638332554 + ... + 638332585.

It is an arithmetic number, because the mean of its divisors is an integer number (3957661934).

Almost surely, 2^20426642224 is an apocalyptic number.

It is an amenable number.

20426642224 is a deficient number, since it is larger than the sum of its proper divisors (19149977116).

20426642224 is a wasteful number, since it uses less digits than its factorization.

20426642224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276665147 (or 1276665141 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 34.

The spelling of 20426642224 in words is "twenty billion, four hundred twenty-six million, six hundred forty-two thousand, two hundred twenty-four".