23780321 has 4 divisors (see below), whose sum is σ = 24814272. Its totient is φ = 22746372.

The previous prime is 23780311. The next prime is 23780327. The reversal of 23780321 is 12308732.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23780321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23780327) 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, 516941 + ... + 516986.

It is an arithmetic number, because the mean of its divisors is an integer number (6203568).

Almost surely, 2^23780321 is an apocalyptic number.

It is an amenable number.

23780321 is a deficient number, since it is larger than the sum of its proper divisors (1033951).

23780321 is a wasteful number, since it uses less digits than its factorization.

23780321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033950.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 23780321 is about 4876.5070491080. The cubic root of 23780321 is about 287.5671263549.

The spelling of 23780321 in words is "twenty-three million, seven hundred eighty thousand, three hundred twenty-one".