23920381 has 2 divisors, whose sum is σ = 23920382. Its totient is φ = 23920380.

The previous prime is 23920367. The next prime is 23920387. The reversal of 23920381 is 18302932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23912100 + 8281 = 4890^2 + 91^2 .

It is a cyclic number.

It is not a de Polignac number, because 23920381 - 2⁵ = 23920349 is a prime.

It is a super-2 number, since 2×23920381² = 1144369254370322, 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 (23920387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11960190 + 11960191.

It is an arithmetic number, because the mean of its divisors is an integer number (11960191).

Almost surely, 2^23920381 is an apocalyptic number.

It is an amenable number.

23920381 is a deficient number, since it is larger than the sum of its proper divisors (1).

23920381 is an equidigital number, since it uses as much as digits as its factorization.

23920381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 23920381 is about 4890.8466547215. The cubic root of 23920381 is about 288.1305871591.

The spelling of 23920381 in words is "twenty-three million, nine hundred twenty thousand, three hundred eighty-one".