20449297 has 8 divisors (see below), whose sum is σ = 22390560. Its totient is φ = 18521760.

The previous prime is 20449279. The next prime is 20449309. The reversal of 20449297 is 79294402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20449297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20449267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172 + ... + 6397.

It is an arithmetic number, because the mean of its divisors is an integer number (2798820).

Almost surely, 2^20449297 is an apocalyptic number.

It is an amenable number.

20449297 is a deficient number, since it is larger than the sum of its proper divisors (1941263).

20449297 is a wasteful number, since it uses less digits than its factorization.

20449297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6863.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 20449297 is about 4522.0898929588. The cubic root of 20449297 is about 273.4593607143.

The spelling of 20449297 in words is "twenty million, four hundred forty-nine thousand, two hundred ninety-seven".