20982959280 has 200 divisors, whose sum is σ = 75390598800. Its totient is φ = 5402460672.

The previous prime is 20982959269. The next prime is 20982959303. The reversal of 20982959280 is 8295928902.

20982959280 is a `hidden beast` number, since 20 + 9 + 8 + 29 + 592 + 8 + 0 = 666.

It is a super-2 number, since 2×20982959280² (a number of 21 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 132091 + ... + 243749.

It is an arithmetic number, because the mean of its divisors is an integer number (376952994).

Almost surely, 2^20982959280 is an apocalyptic number.

20982959280 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 20982959280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37695299400).

20982959280 is an abundant number, since it is smaller than the sum of its proper divisors (54407639520).

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

20982959280 is a wasteful number, since it uses less digits than its factorization.

20982959280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111713 (or 111698 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The spelling of 20982959280 in words is "twenty billion, nine hundred eighty-two million, nine hundred fifty-nine thousand, two hundred eighty".