20647442006 has 16 divisors (see below), whose sum is σ = 32917747200. Its totient is φ = 9685410408.

The previous prime is 20647442003. The next prime is 20647442117. The reversal of 20647442006 is 60024474602.

It is a super-2 number, since 2×20647442006² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20647442003) 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, 2633726 + ... + 2641553.

It is an arithmetic number, because the mean of its divisors is an integer number (2057359200).

Almost surely, 2^20647442006 is an apocalyptic number.

20647442006 is a deficient number, since it is larger than the sum of its proper divisors (12270305194).

20647442006 is a wasteful number, since it uses less digits than its factorization.

20647442006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5275403.

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

The spelling of 20647442006 in words is "twenty billion, six hundred forty-seven million, four hundred forty-two thousand, six".