20742550133 has 2 divisors, whose sum is σ = 20742550134. Its totient is φ = 20742550132.

The previous prime is 20742550123. The next prime is 20742550177. The reversal of 20742550133 is 33105524702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18785991844 + 1956558289 = 137062^2 + 44233^2 .

It is a cyclic number.

It is not a de Polignac number, because 20742550133 - 2⁴ = 20742550117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20742550133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20742550123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10371275066 + 10371275067.

It is an arithmetic number, because the mean of its divisors is an integer number (10371275067).

Almost surely, 2^20742550133 is an apocalyptic number.

It is an amenable number.

20742550133 is a deficient number, since it is larger than the sum of its proper divisors (1).

20742550133 is an equidigital number, since it uses as much as digits as its factorization.

20742550133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 32.

The spelling of 20742550133 in words is "twenty billion, seven hundred forty-two million, five hundred fifty thousand, one hundred thirty-three".