20202553 has 12 divisors (see below), whose sum is σ = 23836032. Its totient is φ = 17069640.

The previous prime is 20202517. The next prime is 20202557. The reversal of 20202553 is 35520202.

It is not a de Polignac number, because 20202553 - 2¹⁷ = 20071481 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20202553.

It is not an unprimeable number, because it can be changed into a prime (20202557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 576 + ... + 6382.

It is an arithmetic number, because the mean of its divisors is an integer number (1986336).

Almost surely, 2^20202553 is an apocalyptic number.

It is an amenable number.

20202553 is a deficient number, since it is larger than the sum of its proper divisors (3633479).

20202553 is an equidigital number, since it uses as much as digits as its factorization.

20202553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5892 (or 5885 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 20202553 is about 4494.7250193977. The cubic root of 20202553 is about 272.3550411575.

Adding to 20202553 its reverse (35520202), we get a palindrome (55722755).

The spelling of 20202553 in words is "twenty million, two hundred two thousand, five hundred fifty-three".