19941161 has 4 divisors (see below), whose sum is σ = 20808192. Its totient is φ = 19074132.

The previous prime is 19941149. The next prime is 19941179. The reversal of 19941161 is 16114991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16114991 = 2543 ⋅6337.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19941161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19941461) 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, 433481 + ... + 433526.

It is an arithmetic number, because the mean of its divisors is an integer number (5202048).

Almost surely, 2^19941161 is an apocalyptic number.

It is an amenable number.

19941161 is a deficient number, since it is larger than the sum of its proper divisors (867031).

19941161 is an equidigital number, since it uses as much as digits as its factorization.

19941161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867030.

The product of its digits is 1944, while the sum is 32.

The square root of 19941161 is about 4465.5527093519. The cubic root of 19941161 is about 271.1753108298.

It can be divided in two parts, 19941 and 161, that added together give a palindrome (20102).

The spelling of 19941161 in words is "nineteen million, nine hundred forty-one thousand, one hundred sixty-one".