19991414 has 8 divisors (see below), whose sum is σ = 30053280. Its totient is φ = 9973656.

The previous prime is 19991381. The next prime is 19991423. The reversal of 19991414 is 41419991.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9869 + ... + 11720.

It is an arithmetic number, because the mean of its divisors is an integer number (3756660).

Almost surely, 2^19991414 is an apocalyptic number.

19991414 is a deficient number, since it is larger than the sum of its proper divisors (10061866).

19991414 is a wasteful number, since it uses less digits than its factorization.

19991414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22054.

The product of its digits is 11664, while the sum is 38.

The square root of 19991414 is about 4471.1759079687. The cubic root of 19991414 is about 271.4029127836.

The spelling of 19991414 in words is "nineteen million, nine hundred ninety-one thousand, four hundred fourteen".