19214254091 has 2 divisors, whose sum is σ = 19214254092. Its totient is φ = 19214254090.

The previous prime is 19214254079. The next prime is 19214254093. The reversal of 19214254091 is 19045241291.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19214254091 - 2¹⁸ = 19213991947 is a prime.

Together with 19214254093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19214254093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9607127045 + 9607127046.

It is an arithmetic number, because the mean of its divisors is an integer number (9607127046).

Almost surely, 2^19214254091 is an apocalyptic number.

19214254091 is a deficient number, since it is larger than the sum of its proper divisors (1).

19214254091 is an equidigital number, since it uses as much as digits as its factorization.

19214254091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 38.

The spelling of 19214254091 in words is "nineteen billion, two hundred fourteen million, two hundred fifty-four thousand, ninety-one".