20101079 has 2 divisors, whose sum is σ = 20101080. Its totient is φ = 20101078.

The previous prime is 20101073. The next prime is 20101091. The reversal of 20101079 is 97010102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20101079 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20101079.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20101073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050539 + 10050540.

It is an arithmetic number, because the mean of its divisors is an integer number (10050540).

Almost surely, 2^20101079 is an apocalyptic number.

20101079 is a deficient number, since it is larger than the sum of its proper divisors (1).

20101079 is an equidigital number, since it uses as much as digits as its factorization.

20101079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 20101079 is about 4483.4226880811. The cubic root of 20101079 is about 271.8982778149.

The spelling of 20101079 in words is "twenty million, one hundred one thousand, seventy-nine".