19961841 has 8 divisors (see below), whose sum is σ = 26688640. Its totient is φ = 13271472.

The previous prime is 19961827. The next prime is 19961857. The reversal of 19961841 is 14816991.

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

It is not a de Polignac number, because 19961841 - 2⁹ = 19961329 is a prime.

It is a super-2 number, since 2×19961841² = 796950192218562, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 19961841.

It is not an unprimeable number, because it can be changed into a prime (19961881) 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 7 ways as a sum of consecutive naturals, for example, 7801 + ... + 10038.

It is an arithmetic number, because the mean of its divisors is an integer number (3336080).

Almost surely, 2^19961841 is an apocalyptic number.

It is an amenable number.

19961841 is a deficient number, since it is larger than the sum of its proper divisors (6726799).

19961841 is a wasteful number, since it uses less digits than its factorization.

19961841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18215.

The product of its digits is 15552, while the sum is 39.

The square root of 19961841 is about 4467.8676121837. The cubic root of 19961841 is about 271.2690193152.

It can be divided in two parts, 19961 and 841, that added together give a palindrome (20802).

The spelling of 19961841 in words is "nineteen million, nine hundred sixty-one thousand, eight hundred forty-one".