19968495 has 16 divisors (see below), whose sum is σ = 32980992. Its totient is φ = 10306080.

The previous prime is 19968457. The next prime is 19968497. The reversal of 19968495 is 59486991.

19968495 = 83² + 84² + ... + 392².

It is not a de Polignac number, because 19968495 - 2²² = 15774191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19968497) 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, 21007 + ... + 21936.

It is an arithmetic number, because the mean of its divisors is an integer number (2061312).

Almost surely, 2^19968495 is an apocalyptic number.

19968495 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19968495 is a deficient number, since it is larger than the sum of its proper divisors (13012497).

19968495 is a wasteful number, since it uses less digits than its factorization.

19968495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42982.

The product of its digits is 699840, while the sum is 51.

The square root of 19968495 is about 4468.6122006726. The cubic root of 19968495 is about 271.2991572090.

The spelling of 19968495 in words is "nineteen million, nine hundred sixty-eight thousand, four hundred ninety-five".