20756853 has 12 divisors (see below), whose sum is σ = 32288620. Its totient is φ = 12773376.

The previous prime is 20756851. The next prime is 20756863. The reversal of 20756853 is 35865702.

It can be written as a sum of positive squares in 2 ways, for example, as 10909809 + 9847044 = 3303^2 + 3138^2 .

It is not a de Polignac number, because 20756853 - 2¹ = 20756851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20756851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88588 + ... + 88821.

Almost surely, 2^20756853 is an apocalyptic number.

It is an amenable number.

20756853 is a deficient number, since it is larger than the sum of its proper divisors (11531767).

20756853 is a wasteful number, since it uses less digits than its factorization.

20756853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177428 (or 177425 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 20756853 is about 4555.9689419486. The cubic root of 20756853 is about 274.8234812096.

It can be divided in two parts, 20756 and 853, that added together give a square (21609 = 147²).

The spelling of 20756853 in words is "twenty million, seven hundred fifty-six thousand, eight hundred fifty-three".