20842573 has 8 divisors (see below), whose sum is σ = 21783168. Its totient is φ = 19922784.

The previous prime is 20842553. The next prime is 20842579. The reversal of 20842573 is 37524802.

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-20842573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20842579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3136 + ... + 7177.

It is an arithmetic number, because the mean of its divisors is an integer number (2722896).

Almost surely, 2^20842573 is an apocalyptic number.

It is an amenable number.

20842573 is a deficient number, since it is larger than the sum of its proper divisors (940595).

20842573 is a wasteful number, since it uses less digits than its factorization.

20842573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10403.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 20842573 is about 4565.3666884490. The cubic root of 20842573 is about 275.2012763386.

The spelling of 20842573 in words is "twenty million, eight hundred forty-two thousand, five hundred seventy-three".