19941855 has 8 divisors (see below), whose sum is σ = 31906992. Its totient is φ = 10635648.

The previous prime is 19941839. The next prime is 19941863. The reversal of 19941855 is 55814991.

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

It is not a de Polignac number, because 19941855 - 2⁴ = 19941839 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 664714 + ... + 664743.

It is an arithmetic number, because the mean of its divisors is an integer number (3988374).

Almost surely, 2^19941855 is an apocalyptic number.

19941855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19941855 is a deficient number, since it is larger than the sum of its proper divisors (11965137).

19941855 is a wasteful number, since it uses less digits than its factorization.

19941855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329465.

The product of its digits is 64800, while the sum is 42.

The square root of 19941855 is about 4465.6304146223. The cubic root of 19941855 is about 271.1784566427.

The spelling of 19941855 in words is "nineteen million, nine hundred forty-one thousand, eight hundred fifty-five".