20101058917 has 2 divisors, whose sum is σ = 20101058918. Its totient is φ = 20101058916.

The previous prime is 20101058903. The next prime is 20101058921. The reversal of 20101058917 is 71985010102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18174814596 + 1926244321 = 134814^2 + 43889^2 .

It is a cyclic number.

It is not a de Polignac number, because 20101058917 - 2¹¹ = 20101056869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20101058947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050529458 + 10050529459.

It is an arithmetic number, because the mean of its divisors is an integer number (10050529459).

Almost surely, 2^20101058917 is an apocalyptic number.

It is an amenable number.

20101058917 is a deficient number, since it is larger than the sum of its proper divisors (1).

20101058917 is an equidigital number, since it uses as much as digits as its factorization.

20101058917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 34.

The spelling of 20101058917 in words is "twenty billion, one hundred one million, fifty-eight thousand, nine hundred seventeen".