20443678080 has 512 divisors, whose sum is σ = 78140160000. Its totient is φ = 4541128704.

The previous prime is 20443678069. The next prime is 20443678081. The reversal of 20443678080 is 8087634402.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20443678081) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24366301 + ... + 24367139.

It is an arithmetic number, because the mean of its divisors is an integer number (152617500).

Almost surely, 2^20443678080 is an apocalyptic number.

20443678080 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 20443678080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39070080000).

20443678080 is an abundant number, since it is smaller than the sum of its proper divisors (57696481920).

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

20443678080 is an equidigital number, since it uses as much as digits as its factorization.

20443678080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919 (or 893 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 42.

The spelling of 20443678080 in words is "twenty billion, four hundred forty-three million, six hundred seventy-eight thousand, eighty".