23020581 has 4 divisors (see below), whose sum is σ = 30694112. Its totient is φ = 15347052.

The previous prime is 23020573. The next prime is 23020583. The reversal of 23020581 is 18502032.

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 not a de Polignac number, because 23020581 - 2³ = 23020573 is a prime.

It is a super-2 number, since 2×23020581² = 1059894299155122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23020583) 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, 3836761 + ... + 3836766.

It is an arithmetic number, because the mean of its divisors is an integer number (7673528).

Almost surely, 2^23020581 is an apocalyptic number.

It is an amenable number.

23020581 is a deficient number, since it is larger than the sum of its proper divisors (7673531).

23020581 is an equidigital number, since it uses as much as digits as its factorization.

23020581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7673530.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 23020581 is about 4797.9767610942. The cubic root of 23020581 is about 284.4714982417.

The spelling of 23020581 in words is "twenty-three million, twenty thousand, five hundred eighty-one".