20006426447 has 16 divisors (see below), whose sum is σ = 24073094400. Its totient is φ = 16242301440.

The previous prime is 20006426441. The next prime is 20006426477. The reversal of 20006426447 is 74462460002.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20006426447 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 (20006426441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 727172 + ... + 754182.

It is an arithmetic number, because the mean of its divisors is an integer number (1504568400).

Almost surely, 2^20006426447 is an apocalyptic number.

20006426447 is a deficient number, since it is larger than the sum of its proper divisors (4066667953).

20006426447 is a wasteful number, since it uses less digits than its factorization.

20006426447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32606.

The product of its (nonzero) digits is 64512, while the sum is 35.

Adding to 20006426447 its reverse (74462460002), we get a palindrome (94468886449).

The spelling of 20006426447 in words is "twenty billion, six million, four hundred twenty-six thousand, four hundred forty-seven".