23620021 has 8 divisors (see below), whose sum is σ = 26326080. Its totient is φ = 21060288.

The previous prime is 23620019. The next prime is 23620027. The reversal of 23620021 is 12002632.

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 23620021 - 2¹ = 23620019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23619977 and 23620004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23620027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36241 + ... + 36886.

It is an arithmetic number, because the mean of its divisors is an integer number (3290760).

Almost surely, 2^23620021 is an apocalyptic number.

It is an amenable number.

23620021 is a deficient number, since it is larger than the sum of its proper divisors (2706059).

23620021 is a wasteful number, since it uses less digits than its factorization.

23620021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73163.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 23620021 is about 4860.0433125642. The cubic root of 23620021 is about 286.9195183608.

Adding to 23620021 its reverse (12002632), we get a palindrome (35622653).

The spelling of 23620021 in words is "twenty-three million, six hundred twenty thousand, twenty-one".