23720281 has 8 divisors (see below), whose sum is σ = 25631424. Its totient is φ = 21821520.

The previous prime is 23720273. The next prime is 23720297. The reversal of 23720281 is 18202732.

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

It is a cyclic number.

It is not a de Polignac number, because 23720281 - 2³ = 23720273 is a prime.

It is a super-2 number, since 2×23720281² = 1125303461437922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23720201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1110 + ... + 6976.

It is an arithmetic number, because the mean of its divisors is an integer number (3203928).

Almost surely, 2^23720281 is an apocalyptic number.

It is an amenable number.

23720281 is a deficient number, since it is larger than the sum of its proper divisors (1911143).

23720281 is a wasteful number, since it uses less digits than its factorization.

23720281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6191.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 23720281 is about 4870.3471128863. The cubic root of 23720281 is about 287.3249081328.

The spelling of 23720281 in words is "twenty-three million, seven hundred twenty thousand, two hundred eighty-one".