20874772167629 has 2 divisors, whose sum is σ = 20874772167630. Its totient is φ = 20874772167628.

The previous prime is 20874772167611. The next prime is 20874772167643. The reversal of 20874772167629 is 92676127747802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19087925074729 + 1786847092900 = 4368973^2 + 1336730^2 .

It is a cyclic number.

It is not a de Polignac number, because 20874772167629 - 2²⁴ = 20874755390413 is a prime.

It is a super-2 number, since 2×20874772167629² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20874772167829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10437386083814 + 10437386083815.

It is an arithmetic number, because the mean of its divisors is an integer number (10437386083815).

Almost surely, 2^{20874772167629} is an apocalyptic number.

It is an amenable number.

20874772167629 is a deficient number, since it is larger than the sum of its proper divisors (1).

20874772167629 is an equidigital number, since it uses as much as digits as its factorization.

20874772167629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 199148544, while the sum is 68.

The spelling of 20874772167629 in words is "twenty trillion, eight hundred seventy-four billion, seven hundred seventy-two million, one hundred sixty-seven thousand, six hundred twenty-nine".