20454553 has 12 divisors (see below), whose sum is σ = 24835072. Its totient is φ = 16499520.

The previous prime is 20454547. The next prime is 20454557. The reversal of 20454553 is 35545402.

It is not a de Polignac number, because 20454553 - 2⁹ = 20454041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20454557) 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 11 ways as a sum of consecutive naturals, for example, 3033 + ... + 7078.

Almost surely, 2^20454553 is an apocalyptic number.

It is an amenable number.

20454553 is a deficient number, since it is larger than the sum of its proper divisors (4380519).

20454553 is a wasteful number, since it uses less digits than its factorization.

20454553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10152 (or 10135 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 28.

The square root of 20454553 is about 4522.6710028478. The cubic root of 20454553 is about 273.4827874247.

Adding to 20454553 its reverse (35545402), we get a palindrome (55999955).

The spelling of 20454553 in words is "twenty million, four hundred fifty-four thousand, five hundred fifty-three".