23922021 has 8 divisors (see below), whose sum is σ = 31925664. Its totient is φ = 15933200.

The previous prime is 23921999. The next prime is 23922037. The reversal of 23922021 is 12022932.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23922021 - 2¹⁸ = 23659877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23932021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 871 + ... + 6971.

It is an arithmetic number, because the mean of its divisors is an integer number (3990708).

Almost surely, 2^23922021 is an apocalyptic number.

It is an amenable number.

23922021 is a deficient number, since it is larger than the sum of its proper divisors (8003643).

23922021 is a wasteful number, since it uses less digits than its factorization.

23922021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7411.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 23922021 is about 4891.0143119807. The cubic root of 23922021 is about 288.1371718280.

Adding to 23922021 its reverse (12022932), we get a palindrome (35944953).

The spelling of 23922021 in words is "twenty-three million, nine hundred twenty-two thousand, twenty-one".