20863509360 has 320 divisors, whose sum is σ = 69906240000. Its totient is φ = 5131137024.

The previous prime is 20863509343. The next prime is 20863509371. The reversal of 20863509360 is 6390536802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 41810391 + ... + 41810889.

It is an arithmetic number, because the mean of its divisors is an integer number (218457000).

Almost surely, 2^20863509360 is an apocalyptic number.

20863509360 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 20863509360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34953120000).

20863509360 is an abundant number, since it is smaller than the sum of its proper divisors (49042730640).

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

20863509360 is a wasteful number, since it uses less digits than its factorization.

20863509360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760 (or 754 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

The spelling of 20863509360 in words is "twenty billion, eight hundred sixty-three million, five hundred nine thousand, three hundred sixty".