20087746061 has 2 divisors, whose sum is σ = 20087746062. Its totient is φ = 20087746060.

The previous prime is 20087746043. The next prime is 20087746099. The reversal of 20087746061 is 16064778002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20080590436 + 7155625 = 141706^2 + 2675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20087746061 is a prime.

It is a super-2 number, since 2×20087746061² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20087746001) 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, 10043873030 + 10043873031.

It is an arithmetic number, because the mean of its divisors is an integer number (10043873031).

Almost surely, 2^20087746061 is an apocalyptic number.

It is an amenable number.

20087746061 is a deficient number, since it is larger than the sum of its proper divisors (1).

20087746061 is an equidigital number, since it uses as much as digits as its factorization.

20087746061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 41.

The spelling of 20087746061 in words is "twenty billion, eighty-seven million, seven hundred forty-six thousand, sixty-one".