20102105533 has 4 divisors (see below), whose sum is σ = 20192249728. Its totient is φ = 20011961340.

The previous prime is 20102105509. The next prime is 20102105591. The reversal of 20102105533 is 33550120102.

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 20102105533 - 2¹³ = 20102097341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102105333) 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, 45071763 + ... + 45072208.

It is an arithmetic number, because the mean of its divisors is an integer number (5048062432).

Almost surely, 2^20102105533 is an apocalyptic number.

It is an amenable number.

20102105533 is a deficient number, since it is larger than the sum of its proper divisors (90144195).

20102105533 is an equidigital number, since it uses as much as digits as its factorization.

20102105533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90144194.

The product of its (nonzero) digits is 900, while the sum is 22.

Adding to 20102105533 its reverse (33550120102), we get a palindrome (53652225635).

The spelling of 20102105533 in words is "twenty billion, one hundred two million, one hundred five thousand, five hundred thirty-three".