19634997 has 8 divisors (see below), whose sum is σ = 27024640. Its totient is φ = 12667680.

The previous prime is 19634987. The next prime is 19635013. The reversal of 19634997 is 79943691.

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

It is not a de Polignac number, because 19634997 - 2⁷ = 19634869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19634917) 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, 105472 + ... + 105657.

It is an arithmetic number, because the mean of its divisors is an integer number (3378080).

Almost surely, 2^19634997 is an apocalyptic number.

It is an amenable number.

19634997 is a deficient number, since it is larger than the sum of its proper divisors (7389643).

19634997 is a wasteful number, since it uses less digits than its factorization.

19634997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211163.

The product of its digits is 367416, while the sum is 48.

The square root of 19634997 is about 4431.1394697075. The cubic root of 19634997 is about 269.7803288693.

The spelling of 19634997 in words is "nineteen million, six hundred thirty-four thousand, nine hundred ninety-seven".