20643010080 has 576 divisors, whose sum is σ = 83725342848. Its totient is φ = 4226826240.

The previous prime is 20643010079. The next prime is 20643010097. The reversal of 20643010080 is 8001034602.

It is a happy number.

It is a super-2 number, since 2×20643010080² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20643010080.

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, 18886014 + ... + 18887106.

It is an arithmetic number, because the mean of its divisors is an integer number (145356498).

Almost surely, 2^20643010080 is an apocalyptic number.

20643010080 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 20643010080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41862671424).

20643010080 is an abundant number, since it is smaller than the sum of its proper divisors (63082332768).

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

20643010080 is a wasteful number, since it uses less digits than its factorization.

20643010080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209 (or 1194 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 20643010080 its reverse (8001034602), we get a palindrome (28644044682).

The spelling of 20643010080 in words is "twenty billion, six hundred forty-three million, ten thousand, eighty".