23421765 has 16 divisors (see below), whose sum is σ = 37827648. Its totient is φ = 12374016.

The previous prime is 23421719. The next prime is 23421773. The reversal of 23421765 is 56712432.

It is not a de Polignac number, because 23421765 - 2⁹ = 23421253 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5692 + ... + 8901.

It is an arithmetic number, because the mean of its divisors is an integer number (2364228).

Almost surely, 2^23421765 is an apocalyptic number.

It is an amenable number.

23421765 is a deficient number, since it is larger than the sum of its proper divisors (14405883).

23421765 is a wasteful number, since it uses less digits than its factorization.

23421765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14708.

The product of its digits is 10080, while the sum is 30.

The square root of 23421765 is about 4839.6038060982. The cubic root of 23421765 is about 286.1145033549.

The spelling of 23421765 in words is "twenty-three million, four hundred twenty-one thousand, seven hundred sixty-five".