21802789710 has 192 divisors, whose sum is σ = 63582105600. Its totient is φ = 5313589632.

The previous prime is 21802789699. The next prime is 21802789711. The reversal of 21802789710 is 1798720812.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21802789711) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4697571 + ... + 4702209.

It is an arithmetic number, because the mean of its divisors is an integer number (331156800).

Almost surely, 2^21802789710 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21802789710, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31791052800).

21802789710 is an abundant number, since it is smaller than the sum of its proper divisors (41779315890).

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

21802789710 is a wasteful number, since it uses less digits than its factorization.

21802789710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4784 (or 4765 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 45.

The spelling of 21802789710 in words is "twenty-one billion, eight hundred two million, seven hundred eighty-nine thousand, seven hundred ten".