20343019 has 2 divisors, whose sum is σ = 20343020. Its totient is φ = 20343018.

The previous prime is 20342981. The next prime is 20343031. The reversal of 20343019 is 91034302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20343019 - 2²¹ = 18245867 is a prime.

It is a super-2 number, since 2×20343019² = 827676844068722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20343049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10171509 + 10171510.

It is an arithmetic number, because the mean of its divisors is an integer number (10171510).

Almost surely, 2^20343019 is an apocalyptic number.

20343019 is a deficient number, since it is larger than the sum of its proper divisors (1).

20343019 is an equidigital number, since it uses as much as digits as its factorization.

20343019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 20343019 is about 4510.3236025811. The cubic root of 20343019 is about 272.9848014903.

The spelling of 20343019 in words is "twenty million, three hundred forty-three thousand, nineteen".