19911422 has 8 divisors (see below), whose sum is σ = 31165776. Its totient is φ = 9522832.

The previous prime is 19911413. The next prime is 19911431. The reversal of 19911422 is 22411991.

It is an interprime number because it is at equal distance from previous prime (19911413) and next prime (19911431).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216383 + ... + 216474.

It is an arithmetic number, because the mean of its divisors is an integer number (3895722).

Almost surely, 2^19911422 is an apocalyptic number.

19911422 is a deficient number, since it is larger than the sum of its proper divisors (11254354).

19911422 is a wasteful number, since it uses less digits than its factorization.

19911422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432882.

The product of its digits is 1296, while the sum is 29.

The square root of 19911422 is about 4462.2216439796. The cubic root of 19911422 is about 271.0404391299.

The spelling of 19911422 in words is "nineteen million, nine hundred eleven thousand, four hundred twenty-two".