19712814 has 16 divisors (see below), whose sum is σ = 43009920. Its totient is φ = 5973560.

The previous prime is 19712801. The next prime is 19712857. The reversal of 19712814 is 41821791.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

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, 149274 + ... + 149405.

It is an arithmetic number, because the mean of its divisors is an integer number (2688120).

Almost surely, 2^19712814 is an apocalyptic number.

19712814 is an abundant number, since it is smaller than the sum of its proper divisors (23297106).

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

19712814 is a wasteful number, since it uses less digits than its factorization.

19712814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298695.

The product of its digits is 4032, while the sum is 33.

The square root of 19712814 is about 4439.9114856042. The cubic root of 19712814 is about 270.1362549588.

The spelling of 19712814 in words is "nineteen million, seven hundred twelve thousand, eight hundred fourteen".