20769369 has 4 divisors (see below), whose sum is σ = 27692496. Its totient is φ = 13846244.

The previous prime is 20769361. The next prime is 20769377. The reversal of 20769369 is 96396702.

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 an interprime number because it is at equal distance from previous prime (20769361) and next prime (20769377).

It is a cyclic number.

It is not a de Polignac number, because 20769369 - 2³ = 20769361 is a prime.

It is a super-2 number, since 2×20769369² = 862733377316322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20769369.

It is not an unprimeable number, because it can be changed into a prime (20769361) 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, 3461559 + ... + 3461564.

It is an arithmetic number, because the mean of its divisors is an integer number (6923124).

Almost surely, 2^20769369 is an apocalyptic number.

It is an amenable number.

20769369 is a deficient number, since it is larger than the sum of its proper divisors (6923127).

20769369 is an equidigital number, since it uses as much as digits as its factorization.

20769369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6923126.

The product of its (nonzero) digits is 122472, while the sum is 42.

The square root of 20769369 is about 4557.3423176233. The cubic root of 20769369 is about 274.8787079431.

The spelling of 20769369 in words is "twenty million, seven hundred sixty-nine thousand, three hundred sixty-nine".