20240553 has 4 divisors (see below), whose sum is σ = 26987408. Its totient is φ = 13493700.

The previous prime is 20240543. The next prime is 20240581. The reversal of 20240553 is 35504202.

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 not a de Polignac number, because 20240553 - 2¹⁰ = 20239529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20240533) 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, 3373423 + ... + 3373428.

It is an arithmetic number, because the mean of its divisors is an integer number (6746852).

Almost surely, 2^20240553 is an apocalyptic number.

It is an amenable number.

20240553 is a deficient number, since it is larger than the sum of its proper divisors (6746855).

20240553 is an equidigital number, since it uses as much as digits as its factorization.

20240553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6746854.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 20240553 is about 4498.9502108825. The cubic root of 20240553 is about 272.5256963115.

Adding to 20240553 its reverse (35504202), we get a palindrome (55744755).

It can be divided in two parts, 202 and 40553, that added together give a triangular number (40755 = T₂₈₅).

The spelling of 20240553 in words is "twenty million, two hundred forty thousand, five hundred fifty-three".