20620079 has 2 divisors, whose sum is σ = 20620080. Its totient is φ = 20620078.

The previous prime is 20620051. The next prime is 20620081. The reversal of 20620079 is 97002602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20620079 is a prime.

Together with 20620081, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20620049) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10310039 + 10310040.

It is an arithmetic number, because the mean of its divisors is an integer number (10310040).

Almost surely, 2^20620079 is an apocalyptic number.

20620079 is a deficient number, since it is larger than the sum of its proper divisors (1).

20620079 is an equidigital number, since it uses as much as digits as its factorization.

20620079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 20620079 is about 4540.9337145570. The cubic root of 20620079 is about 274.2185151934.

The spelling of 20620079 in words is "twenty million, six hundred twenty thousand, seventy-nine".