20453369 has 4 divisors (see below), whose sum is σ = 20463744. Its totient is φ = 20442996.

The previous prime is 20453327. The next prime is 20453401. The reversal of 20453369 is 96335402.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20453369 is a prime.

It is a super-2 number, since 2×20453369² = 836680606900322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20453269) 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, 1217 + ... + 6510.

It is an arithmetic number, because the mean of its divisors is an integer number (5115936).

Almost surely, 2^20453369 is an apocalyptic number.

It is an amenable number.

20453369 is a deficient number, since it is larger than the sum of its proper divisors (10375).

20453369 is an equidigital number, since it uses as much as digits as its factorization.

20453369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10374.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 20453369 is about 4522.5401048526. The cubic root of 20453369 is about 273.4775105251.

The spelling of 20453369 in words is "twenty million, four hundred fifty-three thousand, three hundred sixty-nine".