24978013 has 4 divisors (see below), whose sum is σ = 25329888. Its totient is φ = 24626140.

The previous prime is 24978001. The next prime is 24978017. The reversal of 24978013 is 31087942.

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 a de Polignac number, because none of the positive numbers 2^k-24978013 is a prime.

It is a super-2 number, since 2×24978013² = 1247802266856338, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 24978013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24978017) 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, 175831 + ... + 175972.

It is an arithmetic number, because the mean of its divisors is an integer number (6332472).

Almost surely, 2^24978013 is an apocalyptic number.

It is an amenable number.

24978013 is a deficient number, since it is larger than the sum of its proper divisors (351875).

24978013 is an equidigital number, since it uses as much as digits as its factorization.

24978013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351874.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 24978013 is about 4997.8008163591. The cubic root of 24978013 is about 292.3160281752.

The spelling of 24978013 in words is "twenty-four million, nine hundred seventy-eight thousand, thirteen".