20273819 has 2 divisors, whose sum is σ = 20273820. Its totient is φ = 20273818.

The previous prime is 20273791. The next prime is 20273821. The reversal of 20273819 is 91837202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20273819 is a prime.

It is a super-2 number, since 2×20273819² = 822055473689522, which contains 22 as substring.

Together with 20273821, 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 (20273119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10136909 + 10136910.

It is an arithmetic number, because the mean of its divisors is an integer number (10136910).

Almost surely, 2^20273819 is an apocalyptic number.

20273819 is a deficient number, since it is larger than the sum of its proper divisors (1).

20273819 is an equidigital number, since it uses as much as digits as its factorization.

20273819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 20273819 is about 4502.6457777622. The cubic root of 20273819 is about 272.6749161751.

The spelling of 20273819 in words is "twenty million, two hundred seventy-three thousand, eight hundred nineteen".