20722464000 has 864 divisors, whose sum is σ = 89868629760. Its totient is φ = 4478976000.

The previous prime is 20722463999. The next prime is 20722464043. The reversal of 20722464000 is 46422702.

It is a happy number.

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, 38303730 + ... + 38304270.

Almost surely, 2^20722464000 is an apocalyptic number.

20722464000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20722464000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44934314880).

20722464000 is an abundant number, since it is smaller than the sum of its proper divisors (69146165760).

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

20722464000 is a wasteful number, since it uses less digits than its factorization.

20722464000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604 (or 577 counting only the distinct ones).

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

Adding to 20722464000 its reverse (46422702), we get a palindrome (20768886702).

The spelling of 20722464000 in words is "twenty billion, seven hundred twenty-two million, four hundred sixty-four thousand".