20456369 has 4 divisors (see below), whose sum is σ = 21533040. Its totient is φ = 19379700.

The previous prime is 20456353. The next prime is 20456393. The reversal of 20456369 is 96365402.

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 20456369 - 2⁴ = 20456353 is a prime.

It is a super-2 number, since 2×20456369² = 836926065328322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20456309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 538307 + ... + 538344.

It is an arithmetic number, because the mean of its divisors is an integer number (5383260).

Almost surely, 2^20456369 is an apocalyptic number.

It is an amenable number.

20456369 is a deficient number, since it is larger than the sum of its proper divisors (1076671).

20456369 is a wasteful number, since it uses less digits than its factorization.

20456369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076670.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 20456369 is about 4522.8717647088. The cubic root of 20456369 is about 273.4908806521.

The spelling of 20456369 in words is "twenty million, four hundred fifty-six thousand, three hundred sixty-nine".