20447004006 has 192 divisors, whose sum is σ = 52937224704. Its totient is φ = 5622566400.

The previous prime is 20447003989. The next prime is 20447004029. The reversal of 20447004006 is 60040074402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 61773261 + ... + 61773591.

It is an arithmetic number, because the mean of its divisors is an integer number (275714712).

Almost surely, 2^20447004006 is an apocalyptic number.

20447004006 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20447004006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26468612352).

20447004006 is an abundant number, since it is smaller than the sum of its proper divisors (32490220698).

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

20447004006 is a wasteful number, since it uses less digits than its factorization.

20447004006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699 (or 696 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

Adding to 20447004006 its reverse (60040074402), we get a palindrome (80487078408).

The spelling of 20447004006 in words is "twenty billion, four hundred forty-seven million, four thousand, six".