20994319 has 2 divisors, whose sum is σ = 20994320. Its totient is φ = 20994318.

The previous prime is 20994317. The next prime is 20994343. The reversal of 20994319 is 91349902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20994319 - 2¹ = 20994317 is a prime.

It is a super-2 number, since 2×20994319² = 881522860547522, which contains 22 as substring.

Together with 20994317, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20994317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10497159 + 10497160.

It is an arithmetic number, because the mean of its divisors is an integer number (10497160).

Almost surely, 2^20994319 is an apocalyptic number.

20994319 is a deficient number, since it is larger than the sum of its proper divisors (1).

20994319 is an equidigital number, since it uses as much as digits as its factorization.

20994319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 20994319 is about 4581.9558051120. The cubic root of 20994319 is about 275.8675369051.

The spelling of 20994319 in words is "twenty million, nine hundred ninety-four thousand, three hundred nineteen".