19826997 has 8 divisors (see below), whose sum is σ = 26998656. Its totient is φ = 12936672.

The previous prime is 19826971. The next prime is 19827023. The reversal of 19826997 is 79962891.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (19826971) and next prime (19827023).

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

It is not a de Polignac number, because 19826997 - 2⁷ = 19826869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19826927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70168 + ... + 70449.

It is an arithmetic number, because the mean of its divisors is an integer number (3374832).

Almost surely, 2^19826997 is an apocalyptic number.

It is an amenable number.

19826997 is a deficient number, since it is larger than the sum of its proper divisors (7171659).

19826997 is a wasteful number, since it uses less digits than its factorization.

19826997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140667.

The product of its digits is 489888, while the sum is 51.

The square root of 19826997 is about 4452.7516211889. The cubic root of 19826997 is about 270.6568233604.

The spelling of 19826997 in words is "nineteen million, eight hundred twenty-six thousand, nine hundred ninety-seven".