23720024 has 8 divisors (see below), whose sum is σ = 44475060. Its totient is φ = 11860008.

The previous prime is 23720023. The next prime is 23720027. The reversal of 23720024 is 42002732.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 23719978 and 23720005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23720023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1482494 + ... + 1482509.

Almost surely, 2^23720024 is an apocalyptic number.

It is an amenable number.

23720024 is a deficient number, since it is larger than the sum of its proper divisors (20755036).

23720024 is a wasteful number, since it uses less digits than its factorization.

23720024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2965009 (or 2965005 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 23720024 is about 4870.3207286584. The cubic root of 23720024 is about 287.3238704446.

Adding to 23720024 its reverse (42002732), we get a palindrome (65722756).

The spelling of 23720024 in words is "twenty-three million, seven hundred twenty thousand, twenty-four".