20842753 has 8 divisors (see below), whose sum is σ = 22312800. Its totient is φ = 19410048.

The previous prime is 20842751. The next prime is 20842763. The reversal of 20842753 is 35724802.

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 20842753 - 2¹ = 20842751 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20842751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8176 + ... + 10417.

It is an arithmetic number, because the mean of its divisors is an integer number (2789100).

Almost surely, 2^20842753 is an apocalyptic number.

It is an amenable number.

20842753 is a deficient number, since it is larger than the sum of its proper divisors (1470047).

20842753 is a wasteful number, since it uses less digits than its factorization.

20842753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18671.

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

The square root of 20842753 is about 4565.3864020475. The cubic root of 20842753 is about 275.2020685646.

The spelling of 20842753 in words is "twenty million, eight hundred forty-two thousand, seven hundred fifty-three".