20859228000 has 768 divisors, whose sum is σ = 83215641600. Its totient is φ = 5044377600.

The previous prime is 20859227971. The next prime is 20859228029. The reversal of 20859228000 is 82295802.

It is an interprime number because it is at equal distance from previous prime (20859227971) and next prime (20859228029).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 116531911 + ... + 116532089.

It is an arithmetic number, because the mean of its divisors is an integer number (108353700).

Almost surely, 2^20859228000 is an apocalyptic number.

20859228000 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 20859228000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41607820800).

20859228000 is an abundant number, since it is smaller than the sum of its proper divisors (62356413600).

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

20859228000 is a wasteful number, since it uses less digits than its factorization.

20859228000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309 (or 285 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 20859228000 in words is "twenty billion, eight hundred fifty-nine million, two hundred twenty-eight thousand".