20572219 has 2 divisors, whose sum is σ = 20572220. Its totient is φ = 20572218.

The previous prime is 20572217. The next prime is 20572241. The reversal of 20572219 is 91227502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20572219 - 2¹ = 20572217 is a prime.

It is a super-2 number, since 2×20572219² = 846432389167922, which contains 22 as substring.

Together with 20572217, 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 (20572213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10286109 + 10286110.

It is an arithmetic number, because the mean of its divisors is an integer number (10286110).

Almost surely, 2^20572219 is an apocalyptic number.

20572219 is a deficient number, since it is larger than the sum of its proper divisors (1).

20572219 is an equidigital number, since it uses as much as digits as its factorization.

20572219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 20572219 is about 4535.6608118333. The cubic root of 20572219 is about 274.0061935837.

The spelling of 20572219 in words is "twenty million, five hundred seventy-two thousand, two hundred nineteen".