20758709860 has 240 divisors, whose sum is σ = 54887051520. Its totient is φ = 6569794560.

The previous prime is 20758709833. The next prime is 20758709887. The reversal of 20758709860 is 6890785702.

It is an interprime number because it is at equal distance from previous prime (20758709833) and next prime (20758709887).

It is a super-2 number, since 2×20758709860² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20758709798 and 20758709807.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 48163845 + ... + 48164275.

It is an arithmetic number, because the mean of its divisors is an integer number (228696048).

Almost surely, 2^20758709860 is an apocalyptic number.

20758709860 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 20758709860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27443525760).

20758709860 is an abundant number, since it is smaller than the sum of its proper divisors (34128341660).

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

20758709860 is a wasteful number, since it uses less digits than its factorization.

20758709860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544 (or 521 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 52.

The spelling of 20758709860 in words is "twenty billion, seven hundred fifty-eight million, seven hundred nine thousand, eight hundred sixty".