23121804 has 24 divisors (see below), whose sum is σ = 54150768. Its totient is φ = 7678720.

The previous prime is 23121797. The next prime is 23121817. The reversal of 23121804 is 40812132.

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, 57 + ... + 6800.

It is an arithmetic number, because the mean of its divisors is an integer number (2256282).

Almost surely, 2^23121804 is an apocalyptic number.

It is an amenable number.

23121804 is an abundant number, since it is smaller than the sum of its proper divisors (31028964).

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

23121804 is a wasteful number, since it uses less digits than its factorization.

23121804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7145 (or 7143 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 23121804 is about 4808.5136996789. The cubic root of 23121804 is about 284.8878352096.

Adding to 23121804 its reverse (40812132), we get a palindrome (63933936).

The spelling of 23121804 in words is "twenty-three million, one hundred twenty-one thousand, eight hundred four".