20200521553 has 4 divisors (see below), whose sum is σ = 20670301168. Its totient is φ = 19730741940.

The previous prime is 20200521521. The next prime is 20200521587. The reversal of 20200521553 is 35512500202.

It is a happy number.

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 20200521553 - 2⁵ = 20200521521 is a prime.

It is a super-2 number, since 2×20200521553² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20200521853) 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, 234889743 + ... + 234889828.

It is an arithmetic number, because the mean of its divisors is an integer number (5167575292).

Almost surely, 2^20200521553 is an apocalyptic number.

It is an amenable number.

20200521553 is a deficient number, since it is larger than the sum of its proper divisors (469779615).

20200521553 is an equidigital number, since it uses as much as digits as its factorization.

20200521553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469779614.

The product of its (nonzero) digits is 3000, while the sum is 25.

The spelling of 20200521553 in words is "twenty billion, two hundred million, five hundred twenty-one thousand, five hundred fifty-three".