23211244420 has 288 divisors, whose sum is σ = 64797110784. Its totient is φ = 6788136960.

The previous prime is 23211244403. The next prime is 23211244421. The reversal of 23211244420 is 2444211232.

It is a super-2 number, since 2×23211244420² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23211244421) 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, 40227172 + ... + 40227748.

It is an arithmetic number, because the mean of its divisors is an integer number (224989968).

Almost surely, 2^23211244420 is an apocalyptic number.

23211244420 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 23211244420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32398555392).

23211244420 is an abundant number, since it is smaller than the sum of its proper divisors (41585866364).

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

23211244420 is a wasteful number, since it uses less digits than its factorization.

23211244420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691 (or 658 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 23211244420 its reverse (2444211232), we get a palindrome (25655455652).

The spelling of 23211244420 in words is "twenty-three billion, two hundred eleven million, two hundred forty-four thousand, four hundred twenty".