20640119 has 2 divisors, whose sum is σ = 20640120. Its totient is φ = 20640118.

The previous prime is 20640107. The next prime is 20640121. The reversal of 20640119 is 91104602.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20640119 - 2⁸ = 20639863 is a prime.

It is a super-2 number, since 2×20640119² = 852029024668322, which contains 22 as substring.

Together with 20640121, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20640094 and 20640103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20640149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10320059 + 10320060.

It is an arithmetic number, because the mean of its divisors is an integer number (10320060).

Almost surely, 2^20640119 is an apocalyptic number.

20640119 is a deficient number, since it is larger than the sum of its proper divisors (1).

20640119 is an equidigital number, since it uses as much as digits as its factorization.

20640119 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 20640119 is about 4543.1397733286. The cubic root of 20640119 is about 274.3073211861.

The spelling of 20640119 in words is "twenty million, six hundred forty thousand, one hundred nineteen".