23423421 has 24 divisors (see below), whose sum is σ = 36808320. Its totient is φ = 13208832.

The previous prime is 23423417. The next prime is 23423429. The reversal of 23423421 is 12432432.

It is not a de Polignac number, because 23423421 - 2² = 23423417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23423429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10605 + ... + 12621.

It is an arithmetic number, because the mean of its divisors is an integer number (1533680).

Almost surely, 2^23423421 is an apocalyptic number.

23423421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23423421 is a deficient number, since it is larger than the sum of its proper divisors (13384899).

23423421 is a wasteful number, since it uses less digits than its factorization.

23423421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2113 (or 2106 counting only the distinct ones).

The product of its digits is 1152, while the sum is 21.

The square root of 23423421 is about 4839.7748914593. The cubic root of 23423421 is about 286.1212462918.

Adding to 23423421 its reverse (12432432), we get a palindrome (35855853).

The spelling of 23423421 in words is "twenty-three million, four hundred twenty-three thousand, four hundred twenty-one".