20799368240 has 80 divisors (see below), whose sum is σ = 55390651200. Its totient is φ = 7115243520.

The previous prime is 20799368221. The next prime is 20799368251. The reversal of 20799368240 is 4286399702.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×20799368240² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210080 + ... + 292800.

It is an arithmetic number, because the mean of its divisors is an integer number (692383140).

Almost surely, 2^20799368240 is an apocalyptic number.

20799368240 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 20799368240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27695325600).

20799368240 is an abundant number, since it is smaller than the sum of its proper divisors (34591282960).

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

20799368240 is a wasteful number, since it uses less digits than its factorization.

20799368240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83190 (or 83184 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 50.

The spelling of 20799368240 in words is "twenty billion, seven hundred ninety-nine million, three hundred sixty-eight thousand, two hundred forty".