21711010146 has 128 divisors (see below), whose sum is σ = 52832845824. Its totient is φ = 5816136960.

The previous prime is 21711010141. The next prime is 21711010163. The reversal of 21711010146 is 64101011712.

It is not an unprimeable number, because it can be changed into a prime (21711010141) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13343385 + ... + 13345011.

It is an arithmetic number, because the mean of its divisors is an integer number (412756608).

Almost surely, 2^21711010146 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21711010146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26416422912).

21711010146 is an abundant number, since it is smaller than the sum of its proper divisors (31121835678).

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

21711010146 is a wasteful number, since it uses less digits than its factorization.

21711010146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984.

The product of its (nonzero) digits is 336, while the sum is 24.

Adding to 21711010146 its reverse (64101011712), we get a palindrome (85812021858).

The spelling of 21711010146 in words is "twenty-one billion, seven hundred eleven million, ten thousand, one hundred forty-six".