23421447 has 16 divisors (see below), whose sum is σ = 39655680. Its totient is φ = 13383576.

The previous prime is 23421443. The next prime is 23421469. The reversal of 23421447 is 74412432.

It is not a de Polignac number, because 23421447 - 2² = 23421443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 23421447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23421443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61773 + ... + 62150.

It is an arithmetic number, because the mean of its divisors is an integer number (2478480).

Almost surely, 2^23421447 is an apocalyptic number.

23421447 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

23421447 is a deficient number, since it is larger than the sum of its proper divisors (16234233).

23421447 is a wasteful number, since it uses less digits than its factorization.

23421447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123939 (or 123933 counting only the distinct ones).

The product of its digits is 5376, while the sum is 27.

The square root of 23421447 is about 4839.5709520576. The cubic root of 23421447 is about 286.1132084792.

Adding to 23421447 its reverse (74412432), we get a palindrome (97833879).

The spelling of 23421447 in words is "twenty-three million, four hundred twenty-one thousand, four hundred forty-seven".