24720345 has 24 divisors (see below), whose sum is σ = 46145736. Its totient is φ = 12169728.

The previous prime is 24720341. The next prime is 24720347. The reversal of 24720345 is 54302742.

It can be written as a sum of positive squares in 4 ways, for example, as 484416 + 24235929 = 696^2 + 4923^2 .

It is not a de Polignac number, because 24720345 - 2² = 24720341 is a prime.

It is a super-2 number, since 2×24720345² = 1222190913838050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24720341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20544 + ... + 21713.

It is an arithmetic number, because the mean of its divisors is an integer number (1922739).

Almost surely, 2^24720345 is an apocalyptic number.

It is an amenable number.

24720345 is a deficient number, since it is larger than the sum of its proper divisors (21425391).

24720345 is a wasteful number, since it uses less digits than its factorization.

24720345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42281 (or 42278 counting only the distinct ones).

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

The square root of 24720345 is about 4971.9558525795. The cubic root of 24720345 is about 291.3073947318.

The spelling of 24720345 in words is "twenty-four million, seven hundred twenty thousand, three hundred forty-five".