20958101 has 2 divisors, whose sum is σ = 20958102. Its totient is φ = 20958100.

The previous prime is 20958089. The next prime is 20958107. The reversal of 20958101 is 10185902.

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., 20566225 + 391876 = 4535^2 + 626^2 .

It is a cyclic number.

It is not a de Polignac number, because 20958101 - 2¹⁰ = 20957077 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20958107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10479050 + 10479051.

It is an arithmetic number, because the mean of its divisors is an integer number (10479051).

Almost surely, 2^20958101 is an apocalyptic number.

It is an amenable number.

20958101 is a deficient number, since it is larger than the sum of its proper divisors (1).

20958101 is an equidigital number, since it uses as much as digits as its factorization.

20958101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 20958101 is about 4578.0018567056. The cubic root of 20958101 is about 275.7088094981.

The spelling of 20958101 in words is "twenty million, nine hundred fifty-eight thousand, one hundred one".