23820505 has 8 divisors (see below), whose sum is σ = 28743624. Its totient is φ = 18950400.

The previous prime is 23820497. The next prime is 23820521. The reversal of 23820505 is 50502832.

It can be written as a sum of positive squares in 4 ways, for example, as 1466521 + 22353984 = 1211^2 + 4728^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23820505 - 2³ = 23820497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23820505.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12256 + ... + 14065.

It is an arithmetic number, because the mean of its divisors is an integer number (3592953).

Almost surely, 2^23820505 is an apocalyptic number.

It is an amenable number.

23820505 is a deficient number, since it is larger than the sum of its proper divisors (4923119).

23820505 is a wasteful number, since it uses less digits than its factorization.

23820505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26507.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 23820505 is about 4880.6254722115. The cubic root of 23820505 is about 287.7290122356.

The spelling of 23820505 in words is "twenty-three million, eight hundred twenty thousand, five hundred five".