19486919 has 2 divisors, whose sum is σ = 19486920. Its totient is φ = 19486918.

The previous prime is 19486903. The next prime is 19486921. The reversal of 19486919 is 91968491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19486919 - 2⁴ = 19486903 is a prime.

It is a super-2 number, since 2×19486919² = 759480024225122, which contains 22 as substring.

Together with 19486921, 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 (19486939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9743459 + 9743460.

It is an arithmetic number, because the mean of its divisors is an integer number (9743460).

Almost surely, 2^19486919 is an apocalyptic number.

19486919 is a deficient number, since it is larger than the sum of its proper divisors (1).

19486919 is an equidigital number, since it uses as much as digits as its factorization.

19486919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 47.

The square root of 19486919 is about 4414.3990530988. The cubic root of 19486919 is about 269.1004309839.

The spelling of 19486919 in words is "nineteen million, four hundred eighty-six thousand, nine hundred nineteen".