23845621 has 2 divisors, whose sum is σ = 23845622. Its totient is φ = 23845620.

The previous prime is 23845583. The next prime is 23845663. The reversal of 23845621 is 12654832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22184100 + 1661521 = 4710^2 + 1289^2 .

It is a cyclic number.

It is not a de Polignac number, because 23845621 - 2²¹ = 21748469 is a prime.

It is a super-2 number, since 2×23845621² = 1137227281751282, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23845021) 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 as a sum of consecutive naturals, namely, 11922810 + 11922811.

It is an arithmetic number, because the mean of its divisors is an integer number (11922811).

Almost surely, 2^23845621 is an apocalyptic number.

It is an amenable number.

23845621 is a deficient number, since it is larger than the sum of its proper divisors (1).

23845621 is an equidigital number, since it uses as much as digits as its factorization.

23845621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 31.

The square root of 23845621 is about 4883.1978251961. The cubic root of 23845621 is about 287.8301025005.

The spelling of 23845621 in words is "twenty-three million, eight hundred forty-five thousand, six hundred twenty-one".