20744315 has 4 divisors (see below), whose sum is σ = 24893184. Its totient is φ = 16595448.

The previous prime is 20744293. The next prime is 20744327. The reversal of 20744315 is 51344702.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20744315 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2074427 + ... + 2074436.

It is an arithmetic number, because the mean of its divisors is an integer number (6223296).

Almost surely, 2^20744315 is an apocalyptic number.

20744315 is a deficient number, since it is larger than the sum of its proper divisors (4148869).

20744315 is an equidigital number, since it uses as much as digits as its factorization.

20744315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4148868.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 20744315 is about 4554.5927370073. The cubic root of 20744315 is about 274.7681351378.

The spelling of 20744315 in words is "twenty million, seven hundred forty-four thousand, three hundred fifteen".