21202033146 has 96 divisors (see below), whose sum is σ = 50654522880. Its totient is φ = 5896737504.

The previous prime is 21202033141. The next prime is 21202033163. The reversal of 21202033146 is 64133020212.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21202033141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1780705 + ... + 1792571.

It is an arithmetic number, because the mean of its divisors is an integer number (527651280).

Almost surely, 2^21202033146 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21202033146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25327261440).

21202033146 is an abundant number, since it is smaller than the sum of its proper divisors (29452489734).

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

21202033146 is a wasteful number, since it uses less digits than its factorization.

21202033146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12048 (or 12041 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21202033146 its reverse (64133020212), we get a palindrome (85335053358).

The spelling of 21202033146 in words is "twenty-one billion, two hundred two million, thirty-three thousand, one hundred forty-six".