19696431 has 16 divisors (see below), whose sum is σ = 27016704. Its totient is φ = 12757824.

The previous prime is 19696427. The next prime is 19696433. The reversal of 19696431 is 13469691.

It is not a de Polignac number, because 19696431 - 2² = 19696427 is a prime.

It is a super-2 number, since 2×19696431² = 775898788275522, which contains 22 as substring.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 19696431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19696433) 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 15 ways as a sum of consecutive naturals, for example, 22555 + ... + 23411.

It is an arithmetic number, because the mean of its divisors is an integer number (1688544).

Almost surely, 2^19696431 is an apocalyptic number.

19696431 is a deficient number, since it is larger than the sum of its proper divisors (7320273).

19696431 is a wasteful number, since it uses less digits than its factorization.

19696431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070.

The product of its digits is 34992, while the sum is 39.

The square root of 19696431 is about 4438.0661329007. The cubic root of 19696431 is about 270.0613989310.

The spelling of 19696431 in words is "nineteen million, six hundred ninety-six thousand, four hundred thirty-one".