23921447 has 4 divisors (see below), whose sum is σ = 26096136. Its totient is φ = 21746760.

The previous prime is 23921423. The next prime is 23921453. The reversal of 23921447 is 74412932.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23921447 - 2⁶ = 23921383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23921407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1087328 + ... + 1087349.

It is an arithmetic number, because the mean of its divisors is an integer number (6524034).

Almost surely, 2^23921447 is an apocalyptic number.

23921447 is a deficient number, since it is larger than the sum of its proper divisors (2174689).

23921447 is a wasteful number, since it uses less digits than its factorization.

23921447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2174688.

The product of its digits is 12096, while the sum is 32.

The square root of 23921447 is about 4890.9556325937. The cubic root of 23921447 is about 288.1348672281.

The spelling of 23921447 in words is "twenty-three million, nine hundred twenty-one thousand, four hundred forty-seven".