24640253 has 4 divisors (see below), whose sum is σ = 26880288. Its totient is φ = 22400220.

The previous prime is 24640249. The next prime is 24640271. The reversal of 24640253 is 35204642.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 24640253 - 2² = 24640249 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24640243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1120001 + ... + 1120022.

It is an arithmetic number, because the mean of its divisors is an integer number (6720072).

Almost surely, 2^24640253 is an apocalyptic number.

It is an amenable number.

24640253 is a deficient number, since it is larger than the sum of its proper divisors (2240035).

24640253 is a wasteful number, since it uses less digits than its factorization.

24640253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240034.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 24640253 is about 4963.8949424822. The cubic root of 24640253 is about 290.9924499011.

Adding to 24640253 its reverse (35204642), we get a palindrome (59844895).

The spelling of 24640253 in words is "twenty-four million, six hundred forty thousand, two hundred fifty-three".