19911714 has 16 divisors (see below), whose sum is σ = 39997152. Its totient is φ = 6608288.

The previous prime is 19911701. The next prime is 19911739. The reversal of 19911714 is 41711991.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5724 + ... + 8519.

It is an arithmetic number, because the mean of its divisors is an integer number (2499822).

Almost surely, 2^19911714 is an apocalyptic number.

19911714 is an abundant number, since it is smaller than the sum of its proper divisors (20085438).

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

19911714 is a wasteful number, since it uses less digits than its factorization.

19911714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14481.

The product of its digits is 2268, while the sum is 33.

The square root of 19911714 is about 4462.2543629874. The cubic root of 19911714 is about 271.0417640549.

The spelling of 19911714 in words is "nineteen million, nine hundred eleven thousand, seven hundred fourteen".