19821714 has 32 divisors (see below), whose sum is σ = 44421696. Its totient is φ = 5843520.

The previous prime is 19821707. The next prime is 19821719. The reversal of 19821714 is 41712891.

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

It is not an unprimeable number, because it can be changed into a prime (19821719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1617 + ... + 6500.

It is an arithmetic number, because the mean of its divisors is an integer number (1388178).

Almost surely, 2^19821714 is an apocalyptic number.

19821714 is an abundant number, since it is smaller than the sum of its proper divisors (24599982).

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

19821714 is a wasteful number, since it uses less digits than its factorization.

19821714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8170.

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

The square root of 19821714 is about 4452.1583529789. The cubic root of 19821714 is about 270.6327819483.

It can be divided in two parts, 198 and 21714, that added together give a palindrome (21912).

The spelling of 19821714 in words is "nineteen million, eight hundred twenty-one thousand, seven hundred fourteen".