20196679 has 2 divisors, whose sum is σ = 20196680. Its totient is φ = 20196678.

The previous prime is 20196653. The next prime is 20196721. The reversal of 20196679 is 97669102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20196679 - 2⁵ = 20196647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20196619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10098339 + 10098340.

It is an arithmetic number, because the mean of its divisors is an integer number (10098340).

Almost surely, 2^20196679 is an apocalyptic number.

20196679 is a deficient number, since it is larger than the sum of its proper divisors (1).

20196679 is an equidigital number, since it uses as much as digits as its factorization.

20196679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 20196679 is about 4494.0715392615. The cubic root of 20196679 is about 272.3286423721.

The spelling of 20196679 in words is "twenty million, one hundred ninety-six thousand, six hundred seventy-nine".