23605421 has 16 divisors (see below), whose sum is σ = 27787776. Its totient is φ = 19633536.

The previous prime is 23605399. The next prime is 23605423. The reversal of 23605421 is 12450632.

It is a cyclic number.

It is not a de Polignac number, because 23605421 - 2⁶ = 23605357 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 (23605423) 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, 51425 + ... + 51881.

It is an arithmetic number, because the mean of its divisors is an integer number (1736736).

Almost surely, 2^23605421 is an apocalyptic number.

It is an amenable number.

23605421 is a deficient number, since it is larger than the sum of its proper divisors (4182355).

23605421 is a wasteful number, since it uses less digits than its factorization.

23605421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 23605421 is about 4858.5410361548. The cubic root of 23605421 is about 286.8603893085.

The spelling of 23605421 in words is "twenty-three million, six hundred five thousand, four hundred twenty-one".