19934919 has 12 divisors (see below), whose sum is σ = 29788200. Its totient is φ = 12831504.

The previous prime is 19934917. The next prime is 19934921. The reversal of 19934919 is 91943991.

It is an interprime number because it is at equal distance from previous prime (19934917) and next prime (19934921).

It is not a de Polignac number, because 19934919 - 2¹ = 19934917 is a prime.

It is a super-2 number, since 2×19934919² = 794801991073122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19934917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37929 + ... + 38450.

It is an arithmetic number, because the mean of its divisors is an integer number (2482350).

Almost surely, 2^19934919 is an apocalyptic number.

19934919 is a deficient number, since it is larger than the sum of its proper divisors (9853281).

19934919 is a wasteful number, since it uses less digits than its factorization.

19934919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76414 (or 76411 counting only the distinct ones).

The product of its digits is 78732, while the sum is 45.

The square root of 19934919 is about 4464.8537490046. The cubic root of 19934919 is about 271.1470133645.

The spelling of 19934919 in words is "nineteen million, nine hundred thirty-four thousand, nine hundred nineteen".