20003020553 has 4 divisors (see below), whose sum is σ = 20180038548. Its totient is φ = 19826002560.

The previous prime is 20003020517. The next prime is 20003020567. The reversal of 20003020553 is 35502030002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9691024249 + 10311996304 = 98443^2 + 101548^2 .

It is a cyclic number.

It is not a de Polignac number, because 20003020553 - 2¹⁶ = 20002955017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20003020153) 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, 88508828 + ... + 88509053.

It is an arithmetic number, because the mean of its divisors is an integer number (5045009637).

Almost surely, 2^20003020553 is an apocalyptic number.

It is an amenable number.

20003020553 is a deficient number, since it is larger than the sum of its proper divisors (177017995).

20003020553 is a wasteful number, since it uses less digits than its factorization.

20003020553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177017994.

The product of its (nonzero) digits is 900, while the sum is 20.

Adding to 20003020553 its reverse (35502030002), we get a palindrome (55505050555).

The spelling of 20003020553 in words is "twenty billion, three million, twenty thousand, five hundred fifty-three".