19881714 has 48 divisors (see below), whose sum is σ = 42903648. Its totient is φ = 6139584.

The previous prime is 19881707. The next prime is 19881727. The reversal of 19881714 is 41718891.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145054 + ... + 145190.

It is an arithmetic number, because the mean of its divisors is an integer number (893826).

Almost surely, 2^19881714 is an apocalyptic number.

19881714 is an abundant number, since it is smaller than the sum of its proper divisors (23021934).

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

19881714 is a wasteful number, since it uses less digits than its factorization.

19881714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 228 counting only the distinct ones).

The product of its digits is 16128, while the sum is 39.

The square root of 19881714 is about 4458.8915662976. The cubic root of 19881714 is about 270.9055738706.

The spelling of 19881714 in words is "nineteen million, eight hundred eighty-one thousand, seven hundred fourteen".