21310068810 has 64 divisors (see below), whose sum is σ = 52149744000. Its totient is φ = 5571121920.

The previous prime is 21310068809. The next prime is 21310068817. The reversal of 21310068810 is 1886001312.

It is a super-2 number, since 2×21310068810² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (21310068817) 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, 2378940 + ... + 2387880.

It is an arithmetic number, because the mean of its divisors is an integer number (814839750).

Almost surely, 2^21310068810 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21310068810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26074872000).

21310068810 is an abundant number, since it is smaller than the sum of its proper divisors (30839675190).

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

21310068810 is a wasteful number, since it uses less digits than its factorization.

21310068810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10503.

The product of its (nonzero) digits is 2304, while the sum is 30.

The spelling of 21310068810 in words is "twenty-one billion, three hundred ten million, sixty-eight thousand, eight hundred ten".