20020187133 has 12 divisors (see below), whose sum is σ = 28922299900. Its totient is φ = 13344829056.

The previous prime is 20020187123. The next prime is 20020187141. The reversal of 20020187133 is 33178102002.

It can be written as a sum of positive squares in 2 ways, for example, as 11415212964 + 8604974169 = 106842^2 + 92763^2 .

It is not a de Polignac number, because 20020187133 - 2⁵ = 20020187101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20020187097 and 20020187106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020187123) 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, 97516 + ... + 222597.

Almost surely, 2^20020187133 is an apocalyptic number.

It is an amenable number.

20020187133 is a deficient number, since it is larger than the sum of its proper divisors (8902112767).

20020187133 is a wasteful number, since it uses less digits than its factorization.

20020187133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327068 (or 327065 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

Adding to 20020187133 its reverse (33178102002), we get a palindrome (53198289135).

The spelling of 20020187133 in words is "twenty billion, twenty million, one hundred eighty-seven thousand, one hundred thirty-three".