20100553 has 16 divisors (see below), whose sum is σ = 22478976. Its totient is φ = 17821440.

The previous prime is 20100541. The next prime is 20100557. The reversal of 20100553 is 35500102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20100553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20100557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127951 + ... + 128107.

It is an arithmetic number, because the mean of its divisors is an integer number (1404936).

Almost surely, 2^20100553 is an apocalyptic number.

It is an amenable number.

20100553 is a deficient number, since it is larger than the sum of its proper divisors (2378423).

20100553 is a wasteful number, since it uses less digits than its factorization.

20100553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384.

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 20100553 is about 4483.3640271564. The cubic root of 20100553 is about 271.8959061389.

Adding to 20100553 its reverse (35500102), we get a palindrome (55600655).

The spelling of 20100553 in words is "twenty million, one hundred thousand, five hundred fifty-three".