20447091200 has 240 divisors, whose sum is σ = 52060060800. Its totient is φ = 7956480000.

The previous prime is 20447091199. The next prime is 20447091209. The reversal of 20447091200 is 219074402.

It is a super-2 number, since 2×20447091200² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20447091209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135411125 + ... + 135411275.

It is an arithmetic number, because the mean of its divisors is an integer number (216916920).

Almost surely, 2^20447091200 is an apocalyptic number.

20447091200 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 20447091200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26030030400).

20447091200 is an abundant number, since it is smaller than the sum of its proper divisors (31612969600).

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

20447091200 is a wasteful number, since it uses less digits than its factorization.

20447091200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399 (or 378 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The spelling of 20447091200 in words is "twenty billion, four hundred forty-seven million, ninety-one thousand, two hundred".