19997682 has 16 divisors (see below), whose sum is σ = 40040352. Its totient is φ = 6658400.

The previous prime is 19997657. The next prime is 19997683. The reversal of 19997682 is 28679991.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (19997683) 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, 7558 + ... + 9854.

It is an arithmetic number, because the mean of its divisors is an integer number (2502522).

Almost surely, 2^19997682 is an apocalyptic number.

19997682 is an abundant number, since it is smaller than the sum of its proper divisors (20042670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19997682 is a wasteful number, since it uses less digits than its factorization.

19997682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3753.

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

The square root of 19997682 is about 4471.8767872114. The cubic root of 19997682 is about 271.4312745543.

The spelling of 19997682 in words is "nineteen million, nine hundred ninety-seven thousand, six hundred eighty-two".