19954679 has 2 divisors, whose sum is σ = 19954680. Its totient is φ = 19954678.

The previous prime is 19954673. The next prime is 19954681. The reversal of 19954679 is 97645991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19954679 - 2¹² = 19950583 is a prime.

Together with 19954681, 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 (19954673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9977339 + 9977340.

It is an arithmetic number, because the mean of its divisors is an integer number (9977340).

Almost surely, 2^19954679 is an apocalyptic number.

19954679 is a deficient number, since it is larger than the sum of its proper divisors (1).

19954679 is an equidigital number, since it uses as much as digits as its factorization.

19954679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 612360, while the sum is 50.

The square root of 19954679 is about 4467.0660393596. The cubic root of 19954679 is about 271.2365730575.

The spelling of 19954679 in words is "nineteen million, nine hundred fifty-four thousand, six hundred seventy-nine".