20788718580 has 192 divisors, whose sum is σ = 74213314560. Its totient is φ = 4732560000.

The previous prime is 20788718551. The next prime is 20788718581. The reversal of 20788718580 is 8581788702.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20788718581) 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, 937825 + ... + 959735.

It is an arithmetic number, because the mean of its divisors is an integer number (386527680).

Almost surely, 2^20788718580 is an apocalyptic number.

20788718580 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 20788718580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37106657280).

20788718580 is an abundant number, since it is smaller than the sum of its proper divisors (53424595980).

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

20788718580 is a wasteful number, since it uses less digits than its factorization.

20788718580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22187 (or 22179 counting only the distinct ones).

The product of its (nonzero) digits is 2007040, while the sum is 54.

The spelling of 20788718580 in words is "twenty billion, seven hundred eighty-eight million, seven hundred eighteen thousand, five hundred eighty".