19691419 has 6 divisors (see below), whose sum is σ = 21644420. Its totient is φ = 17901180.

The previous prime is 19691407. The next prime is 19691431. The reversal of 19691419 is 91419691.

It is an interprime number because it is at equal distance from previous prime (19691407) and next prime (19691431).

It is not a de Polignac number, because 19691419 - 2¹³ = 19683227 is a prime.

It is a super-2 number, since 2×19691419² = 775503964467122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19691489) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 81249 + ... + 81490.

Almost surely, 2^19691419 is an apocalyptic number.

19691419 is a deficient number, since it is larger than the sum of its proper divisors (1953001).

19691419 is a wasteful number, since it uses less digits than its factorization.

19691419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162761 (or 162750 counting only the distinct ones).

The product of its digits is 17496, while the sum is 40.

The square root of 19691419 is about 4437.5014366195. The cubic root of 19691419 is about 270.0384901689.

The spelling of 19691419 in words is "nineteen million, six hundred ninety-one thousand, four hundred nineteen".