20051442133 has 2 divisors, whose sum is σ = 20051442134. Its totient is φ = 20051442132.

The previous prime is 20051442119. The next prime is 20051442143. The reversal of 20051442133 is 33124415002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10633321924 + 9418120209 = 103118^2 + 97047^2 .

It is a cyclic number.

It is not a de Polignac number, because 20051442133 - 2²¹ = 20049344981 is a prime.

It is a super-2 number, since 2×20051442133² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20051442098 and 20051442107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20051442143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10025721066 + 10025721067.

It is an arithmetic number, because the mean of its divisors is an integer number (10025721067).

Almost surely, 2^20051442133 is an apocalyptic number.

It is an amenable number.

20051442133 is a deficient number, since it is larger than the sum of its proper divisors (1).

20051442133 is an equidigital number, since it uses as much as digits as its factorization.

20051442133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 20051442133 its reverse (33124415002), we get a palindrome (53175857135).

The spelling of 20051442133 in words is "twenty billion, fifty-one million, four hundred forty-two thousand, one hundred thirty-three".