19913027 has 2 divisors, whose sum is σ = 19913028. Its totient is φ = 19913026.

The previous prime is 19913017. The next prime is 19913029. The reversal of 19913027 is 72031991.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (72031991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19913027 - 2⁴ = 19913011 is a prime.

Together with 19913029, 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 = 19912984 and 19913002.

It is not a weakly prime, because it can be changed into another prime (19913029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9956513 + 9956514.

It is an arithmetic number, because the mean of its divisors is an integer number (9956514).

Almost surely, 2^19913027 is an apocalyptic number.

19913027 is a deficient number, since it is larger than the sum of its proper divisors (1).

19913027 is an equidigital number, since it uses as much as digits as its factorization.

19913027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 19913027 is about 4462.4014835064. The cubic root of 19913027 is about 271.0477215198.

The spelling of 19913027 in words is "nineteen million, nine hundred thirteen thousand, twenty-seven".