23820261 has 4 divisors (see below), whose sum is σ = 31760352. Its totient is φ = 15880172.

The previous prime is 23820259. The next prime is 23820263. The reversal of 23820261 is 16202832.

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 an interprime number because it is at equal distance from previous prime (23820259) and next prime (23820263).

It is a cyclic number.

It is not a de Polignac number, because 23820261 - 2¹ = 23820259 is a prime.

It is a super-3 number, since 3×23820261³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23820263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3970041 + ... + 3970046.

It is an arithmetic number, because the mean of its divisors is an integer number (7940088).

Almost surely, 2^23820261 is an apocalyptic number.

It is an amenable number.

23820261 is a deficient number, since it is larger than the sum of its proper divisors (7940091).

23820261 is an equidigital number, since it uses as much as digits as its factorization.

23820261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7940090.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 23820261 is about 4880.6004753514. The cubic root of 23820261 is about 287.7280298030.

The spelling of 23820261 in words is "twenty-three million, eight hundred twenty thousand, two hundred sixty-one".