20730853 has 16 divisors (see below), whose sum is σ = 25200000. Its totient is φ = 16793280.

The previous prime is 20730839. The next prime is 20730869. The reversal of 20730853 is 35803702.

It is a cyclic number.

It is not a de Polignac number, because 20730853 - 2¹³ = 20722661 is a prime.

It is a super-2 number, since 2×20730853² = 859536532215218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20730823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1648 + ... + 6646.

It is an arithmetic number, because the mean of its divisors is an integer number (1575000).

Almost surely, 2^20730853 is an apocalyptic number.

It is an amenable number.

20730853 is a deficient number, since it is larger than the sum of its proper divisors (4469147).

20730853 is a wasteful number, since it uses less digits than its factorization.

20730853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5052.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 20730853 is about 4553.1146482381. The cubic root of 20730853 is about 274.7086854514.

The spelling of 20730853 in words is "twenty million, seven hundred thirty thousand, eight hundred fifty-three".