20769853 has 8 divisors (see below), whose sum is σ = 22466808. Its totient is φ = 19087104.

The previous prime is 20769823. The next prime is 20769857. The reversal of 20769853 is 35896702.

It can be written as a sum of positive squares in 4 ways, for example, as 1951609 + 18818244 = 1397^2 + 4338^2 .

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 20769853 - 2²¹ = 18672701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20769857) 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, 400 + ... + 6457.

It is an arithmetic number, because the mean of its divisors is an integer number (2808351).

It is a vampire number, since it can be written as 3029 ⋅ 6857 (with its own digits).

Almost surely, 2^20769853 is an apocalyptic number.

It is an amenable number.

20769853 is a deficient number, since it is larger than the sum of its proper divisors (1696955).

20769853 is a wasteful number, since it uses less digits than its factorization.

20769853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7103.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 20769853 is about 4557.3954184380. The cubic root of 20769853 is about 274.8808431429.

The spelling of 20769853 in words is "twenty million, seven hundred sixty-nine thousand, eight hundred fifty-three".