20695769 has 6 divisors (see below), whose sum is σ = 21842730. Its totient is φ = 19606176.

The previous prime is 20695751. The next prime is 20695789. The reversal of 20695769 is 96759602.

It can be written as a sum of positive squares in only one way, i.e., 12355225 + 8340544 = 3515^2 + 2888^2 .

It is not a de Polignac number, because 20695769 - 2²⁴ = 3918553 is a prime.

It is a super-2 number, since 2×20695769² = 856629709002722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20695729) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28304 + ... + 29025.

It is an arithmetic number, because the mean of its divisors is an integer number (3640455).

Almost surely, 2^20695769 is an apocalyptic number.

It is an amenable number.

20695769 is a deficient number, since it is larger than the sum of its proper divisors (1146961).

20695769 is an equidigital number, since it uses as much as digits as its factorization.

20695769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57367 (or 57348 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 20695769 is about 4549.2602695383. The cubic root of 20695769 is about 274.5536295781.

The spelling of 20695769 in words is "twenty million, six hundred ninety-five thousand, seven hundred sixty-nine".