20689848800 has 36 divisors (see below), whose sum is σ = 50509095336. Its totient is φ = 8275939200.

The previous prime is 20689848763. The next prime is 20689848841. The reversal of 20689848800 is 884898602.

It is a super-2 number, since 2×20689848800² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12930356 + ... + 12931955.

It is an arithmetic number, because the mean of its divisors is an integer number (1403030426).

Almost surely, 2^20689848800 is an apocalyptic number.

20689848800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20689848800 is an abundant number, since it is smaller than the sum of its proper divisors (29819246536).

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

20689848800 is a wasteful number, since it uses less digits than its factorization.

20689848800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25862331 (or 25862318 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 53.

The spelling of 20689848800 in words is "twenty billion, six hundred eighty-nine million, eight hundred forty-eight thousand, eight hundred".