19796161 has 8 divisors (see below), whose sum is σ = 24681024. Its totient is φ = 15425520.

The previous prime is 19796141. The next prime is 19796173. The reversal of 19796161 is 16169791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19796161 - 2⁷ = 19796033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19796141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128470 + ... + 128623.

It is an arithmetic number, because the mean of its divisors is an integer number (3085128).

Almost surely, 2^19796161 is an apocalyptic number.

19796161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

19796161 is a deficient number, since it is larger than the sum of its proper divisors (4884863).

19796161 is a wasteful number, since it uses less digits than its factorization.

19796161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257111.

The product of its digits is 20412, while the sum is 40.

The square root of 19796161 is about 4449.2876958003. The cubic root of 19796161 is about 270.5164372621.

The spelling of 19796161 in words is "nineteen million, seven hundred ninety-six thousand, one hundred sixty-one".