20149079 has 2 divisors, whose sum is σ = 20149080. Its totient is φ = 20149078.

The previous prime is 20149067. The next prime is 20149099. The reversal of 20149079 is 97094102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20149079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20149009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10074539 + 10074540.

It is an arithmetic number, because the mean of its divisors is an integer number (10074540).

Almost surely, 2^20149079 is an apocalyptic number.

20149079 is a deficient number, since it is larger than the sum of its proper divisors (1).

20149079 is an equidigital number, since it uses as much as digits as its factorization.

20149079 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 20149079 is about 4488.7725493725. The cubic root of 20149079 is about 272.1145305959.

The spelling of 20149079 in words is "twenty million, one hundred forty-nine thousand, seventy-nine".