23133820 has 24 divisors (see below), whose sum is σ = 48941424. Its totient is φ = 9184896.

The previous prime is 23133757. The next prime is 23133839. The reversal of 23133820 is 2833132.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 23133791 and 23133800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1482 + ... + 6961.

It is an arithmetic number, because the mean of its divisors is an integer number (2039226).

Almost surely, 2^23133820 is an apocalyptic number.

23133820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23133820 is an abundant number, since it is smaller than the sum of its proper divisors (25807604).

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

23133820 is a wasteful number, since it uses less digits than its factorization.

23133820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8589 (or 8587 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 23133820 is about 4809.7629879236. The cubic root of 23133820 is about 284.9371770834.

Adding to 23133820 its reverse (2833132), we get a palindrome (25966952).

The spelling of 23133820 in words is "twenty-three million, one hundred thirty-three thousand, eight hundred twenty".