23133212220 has 48 divisors (see below), whose sum is σ = 64840140288. Its totient is φ = 6162461760.

The previous prime is 23133212191. The next prime is 23133212227. The reversal of 23133212220 is 2221233132.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23133212227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141336 + ... + 257375.

It is an arithmetic number, because the mean of its divisors is an integer number (1350836256).

Almost surely, 2^23133212220 is an apocalyptic number.

23133212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23133212220 is an abundant number, since it is smaller than the sum of its proper divisors (41706928068).

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

23133212220 is a wasteful number, since it uses less digits than its factorization.

23133212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399690 (or 399688 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 23133212220 its reverse (2221233132), we get a palindrome (25354445352).

The spelling of 23133212220 in words is "twenty-three billion, one hundred thirty-three million, two hundred twelve thousand, two hundred twenty".