20079149 has 2 divisors, whose sum is σ = 20079150. Its totient is φ = 20079148.

The previous prime is 20079139. The next prime is 20079167. The reversal of 20079149 is 94197002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10125124 + 9954025 = 3182^2 + 3155^2 .

It is a cyclic number.

It is not a de Polignac number, because 20079149 - 2¹⁶ = 20013613 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 (20079109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10039574 + 10039575.

It is an arithmetic number, because the mean of its divisors is an integer number (10039575).

Almost surely, 2^20079149 is an apocalyptic number.

It is an amenable number.

20079149 is a deficient number, since it is larger than the sum of its proper divisors (1).

20079149 is an equidigital number, since it uses as much as digits as its factorization.

20079149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 20079149 is about 4480.9763445035. The cubic root of 20079149 is about 271.7993627439.

The spelling of 20079149 in words is "twenty million, seventy-nine thousand, one hundred forty-nine".