20572319 has 2 divisors, whose sum is σ = 20572320. Its totient is φ = 20572318.

The previous prime is 20572309. The next prime is 20572337. The reversal of 20572319 is 91327502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20572319 - 2²⁰ = 19523743 is a prime.

It is a super-2 number, since 2×20572319² = 846440618075522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20572291 and 20572300.

It is a congruent number.

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, 10286159 + 10286160.

It is an arithmetic number, because the mean of its divisors is an integer number (10286160).

Almost surely, 2^20572319 is an apocalyptic number.

20572319 is a deficient number, since it is larger than the sum of its proper divisors (1).

20572319 is an equidigital number, since it uses as much as digits as its factorization.

20572319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 20572319 is about 4535.6718355719. The cubic root of 20572319 is about 274.0066375574.

The spelling of 20572319 in words is "twenty million, five hundred seventy-two thousand, three hundred nineteen".