19682971 has 16 divisors (see below), whose sum is σ = 24779520. Its totient is φ = 15187680.

The previous prime is 19682969. The next prime is 19682977. The reversal of 19682971 is 17928691.

It is a cyclic number.

It is not a de Polignac number, because 19682971 - 2¹ = 19682969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19682977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7045 + ... + 9433.

It is an arithmetic number, because the mean of its divisors is an integer number (1548720).

Almost surely, 2^19682971 is an apocalyptic number.

19682971 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

19682971 is a deficient number, since it is larger than the sum of its proper divisors (5096549).

19682971 is a wasteful number, since it uses less digits than its factorization.

19682971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2514.

The product of its digits is 54432, while the sum is 43.

The square root of 19682971 is about 4436.5494474873. The cubic root of 19682971 is about 269.9998673982. Note that the first 3 decimals are identical.

The spelling of 19682971 in words is "nineteen million, six hundred eighty-two thousand, nine hundred seventy-one".