19957696 has 28 divisors (see below), whose sum is σ = 43205400. Its totient is φ = 9071360.

The previous prime is 19957681. The next prime is 19957699. The reversal of 19957696 is 69675991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19957699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13471 + ... + 14878.

It is an arithmetic number, because the mean of its divisors is an integer number (1543050).

Almost surely, 2^19957696 is an apocalyptic number.

19957696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19957696 is an abundant number, since it is smaller than the sum of its proper divisors (23247704).

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

19957696 is a wasteful number, since it uses less digits than its factorization.

19957696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28372 (or 28362 counting only the distinct ones).

The product of its digits is 918540, while the sum is 52.

The square root of 19957696 is about 4467.4037202832. The cubic root of 19957696 is about 271.2502420238.

The spelling of 19957696 in words is "nineteen million, nine hundred fifty-seven thousand, six hundred ninety-six".