20708369 has 4 divisors (see below), whose sum is σ = 22590960. Its totient is φ = 18825780.

The previous prime is 20708323. The next prime is 20708377. The reversal of 20708369 is 96380702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20708369 - 2¹⁶ = 20642833 is a prime.

It is a super-2 number, since 2×20708369² = 857673093280322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20708399) 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, 941279 + ... + 941300.

It is an arithmetic number, because the mean of its divisors is an integer number (5647740).

Almost surely, 2^20708369 is an apocalyptic number.

It is an amenable number.

20708369 is a deficient number, since it is larger than the sum of its proper divisors (1882591).

20708369 is a wasteful number, since it uses less digits than its factorization.

20708369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1882590.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 20708369 is about 4550.6448993522. The cubic root of 20708369 is about 274.6093361966.

The spelling of 20708369 in words is "twenty million, seven hundred eight thousand, three hundred sixty-nine".