20452553 has 4 divisors (see below), whose sum is σ = 22311888. Its totient is φ = 18593220.

The previous prime is 20452519. The next prime is 20452559. The reversal of 20452553 is 35525402.

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 20452553 - 2⁸ = 20452297 is a prime.

It is a super-3 number, since 3×20452553³ (a number of 23 digits) contains 333 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 (20452559) 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, 929651 + ... + 929672.

It is an arithmetic number, because the mean of its divisors is an integer number (5577972).

Almost surely, 2^20452553 is an apocalyptic number.

It is an amenable number.

20452553 is a deficient number, since it is larger than the sum of its proper divisors (1859335).

20452553 is a wasteful number, since it uses less digits than its factorization.

20452553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1859334.

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 20452553 is about 4522.4498891641. The cubic root of 20452553 is about 273.4738736244.

Adding to 20452553 its reverse (35525402), we get a palindrome (55977955).

The spelling of 20452553 in words is "twenty million, four hundred fifty-two thousand, five hundred fifty-three".