20740449 has 8 divisors (see below), whose sum is σ = 28043712. Its totient is φ = 13632080.

The previous prime is 20740441. The next prime is 20740463. The reversal of 20740449 is 94404702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20740449 - 2³ = 20740441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20740441) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 48474 + ... + 48899.

It is an arithmetic number, because the mean of its divisors is an integer number (3505464).

Almost surely, 2^20740449 is an apocalyptic number.

It is an amenable number.

20740449 is a deficient number, since it is larger than the sum of its proper divisors (7303263).

20740449 is an equidigital number, since it uses as much as digits as its factorization.

20740449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97447.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 20740449 is about 4554.1683104602. The cubic root of 20740449 is about 274.7510650858.

The spelling of 20740449 in words is "twenty million, seven hundred forty thousand, four hundred forty-nine".