20344553 has 4 divisors (see below), whose sum is σ = 20631168. Its totient is φ = 20057940.

The previous prime is 20344549. The next prime is 20344559. The reversal of 20344553 is 35544302.

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 an emirpimes, since its reverse is a distinct semiprime: 35544302 = 2 ⋅17772151.

It is a cyclic number.

It is not a de Polignac number, because 20344553 - 2² = 20344549 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20344559) 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, 143201 + ... + 143342.

It is an arithmetic number, because the mean of its divisors is an integer number (5157792).

Almost surely, 2^20344553 is an apocalyptic number.

It is an amenable number.

20344553 is a deficient number, since it is larger than the sum of its proper divisors (286615).

20344553 is an equidigital number, since it uses as much as digits as its factorization.

20344553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286614.

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 20344553 is about 4510.4936536925. The cubic root of 20344553 is about 272.9916629459.

Adding to 20344553 its reverse (35544302), we get a palindrome (55888855).

The spelling of 20344553 in words is "twenty million, three hundred forty-four thousand, five hundred fifty-three".