20998316360 has 128 divisors (see below), whose sum is σ = 57341157120. Its totient is φ = 6755868672.

The previous prime is 20998316359. The next prime is 20998316363. The reversal of 20998316360 is 6361389902.

It is a super-3 number, since 3×20998316360³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20998316363) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1645364 + ... + 1658076.

It is an arithmetic number, because the mean of its divisors is an integer number (447977790).

Almost surely, 2^20998316360 is an apocalyptic number.

20998316360 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 20998316360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28670578560).

20998316360 is an abundant number, since it is smaller than the sum of its proper divisors (36342840760).

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

20998316360 is a wasteful number, since it uses less digits than its factorization.

20998316360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13095 (or 13091 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 47.

The spelling of 20998316360 in words is "twenty billion, nine hundred ninety-eight million, three hundred sixteen thousand, three hundred sixty".