20572379 has 2 divisors, whose sum is σ = 20572380. Its totient is φ = 20572378.

The previous prime is 20572369. The next prime is 20572381. The reversal of 20572379 is 97327502.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20572379 is a prime.

It is a Sophie Germain prime.

Together with 20572381, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20572309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10286189 + 10286190.

It is an arithmetic number, because the mean of its divisors is an integer number (10286190).

Almost surely, 2^20572379 is an apocalyptic number.

20572379 is a deficient number, since it is larger than the sum of its proper divisors (1).

20572379 is an equidigital number, since it uses as much as digits as its factorization.

20572379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 20572379 is about 4535.6784498022. The cubic root of 20572379 is about 274.0069039410.

The spelling of 20572379 in words is "twenty million, five hundred seventy-two thousand, three hundred seventy-nine".