19973471 has 8 divisors (see below), whose sum is σ = 22936704. Its totient is φ = 17037720.

The previous prime is 19973461. The next prime is 19973479. The reversal of 19973471 is 17437991.

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

It is not a de Polignac number, because 19973471 - 2¹⁸ = 19711327 is a prime.

It is a super-3 number, since 3×19973471³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19973479) 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 7 ways as a sum of consecutive naturals, for example, 5285 + ... + 8238.

It is an arithmetic number, because the mean of its divisors is an integer number (2867088).

Almost surely, 2^19973471 is an apocalyptic number.

19973471 is a deficient number, since it is larger than the sum of its proper divisors (2963233).

19973471 is a wasteful number, since it uses less digits than its factorization.

19973471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13741.

The product of its digits is 47628, while the sum is 41.

The square root of 19973471 is about 4469.1689384045. The cubic root of 19973471 is about 271.3216905795.

The spelling of 19973471 in words is "nineteen million, nine hundred seventy-three thousand, four hundred seventy-one".