23720445 has 48 divisors (see below), whose sum is σ = 48746880. Its totient is φ = 10839744.

The previous prime is 23720443. The next prime is 23720447. The reversal of 23720445 is 54402732.

It is an interprime number because it is at equal distance from previous prime (23720443) and next prime (23720447).

It is not a de Polignac number, because 23720445 - 2¹ = 23720443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23720443) 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 in 47 ways as a sum of consecutive naturals, for example, 7111 + ... + 9899.

It is an arithmetic number, because the mean of its divisors is an integer number (1015560).

Almost surely, 2^23720445 is an apocalyptic number.

It is an amenable number.

23720445 is an abundant number, since it is smaller than the sum of its proper divisors (25026435).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23720445 is an equidigital number, since it uses as much as digits as its factorization.

23720445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2816 (or 2804 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 23720445 is about 4870.3639494395. The cubic root of 23720445 is about 287.3255703113.

The spelling of 23720445 in words is "twenty-three million, seven hundred twenty thousand, four hundred forty-five".