20797369 has 4 divisors (see below), whose sum is σ = 20825460. Its totient is φ = 20769280.

The previous prime is 20797363. The next prime is 20797411. The reversal of 20797369 is 96379702.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3258025 + 17539344 = 1805^2 + 4188^2 .

It is a cyclic number.

It is not a de Polignac number, because 20797369 - 2²¹ = 18700217 is a prime.

It is a super-2 number, since 2×20797369² = 865061114644322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20797363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12904 + ... + 14425.

It is an arithmetic number, because the mean of its divisors is an integer number (5206365).

Almost surely, 2^20797369 is an apocalyptic number.

It is an amenable number.

20797369 is a deficient number, since it is larger than the sum of its proper divisors (28091).

20797369 is an equidigital number, since it uses as much as digits as its factorization.

20797369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28090.

The product of its (nonzero) digits is 142884, while the sum is 43.

The square root of 20797369 is about 4560.4132488186. The cubic root of 20797369 is about 275.0021773932.

The spelling of 20797369 in words is "twenty million, seven hundred ninety-seven thousand, three hundred sixty-nine".