23720443 has 2 divisors, whose sum is σ = 23720444. Its totient is φ = 23720442.

The previous prime is 23720407. The next prime is 23720447. The reversal of 23720443 is 34402732.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23720443 - 2⁹ = 23719931 is a prime.

It is a super-2 number, since 2×23720443² = 1125318832232498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23720447) 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, 11860221 + 11860222.

It is an arithmetic number, because the mean of its divisors is an integer number (11860222).

Almost surely, 2^23720443 is an apocalyptic number.

23720443 is a deficient number, since it is larger than the sum of its proper divisors (1).

23720443 is an equidigital number, since it uses as much as digits as its factorization.

23720443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 25.

The square root of 23720443 is about 4870.3637441160. The cubic root of 23720443 is about 287.3255622360.

The spelling of 23720443 in words is "twenty-three million, seven hundred twenty thousand, four hundred forty-three".