23340421 has 12 divisors (see below), whose sum is σ = 25456032. Its totient is φ = 21390096.

The previous prime is 23340419. The next prime is 23340437. The reversal of 23340421 is 12404332.

23340421 = T₄₄₃ + T₄₄₄ + ... + T₆₀₉.

It is not a de Polignac number, because 23340421 - 2¹ = 23340419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23340481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27810 + ... + 28636.

It is an arithmetic number, because the mean of its divisors is an integer number (2121336).

Almost surely, 2^23340421 is an apocalyptic number.

It is an amenable number.

23340421 is a deficient number, since it is larger than the sum of its proper divisors (2115611).

23340421 is a wasteful number, since it uses less digits than its factorization.

23340421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020 (or 1007 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 23340421 is about 4831.1925028920. The cubic root of 23340421 is about 285.7828930838.

Adding to 23340421 its reverse (12404332), we get a palindrome (35744753).

The spelling of 23340421 in words is "twenty-three million, three hundred forty thousand, four hundred twenty-one".