19943442 has 32 divisors (see below), whose sum is σ = 44654400. Its totient is φ = 6597504.

The previous prime is 19943437. The next prime is 19943449. The reversal of 19943442 is 24434991.

It is a junction number, because it is equal to n+sod(n) for n = 19943397 and 19943406.

It is not an unprimeable number, because it can be changed into a prime (19943449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6178 + ... + 8834.

It is an arithmetic number, because the mean of its divisors is an integer number (1395450).

Almost surely, 2^19943442 is an apocalyptic number.

19943442 is an abundant number, since it is smaller than the sum of its proper divisors (24710958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19943442 is a wasteful number, since it uses less digits than its factorization.

19943442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2807 (or 2801 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 19943442 is about 4465.8081015646. The cubic root of 19943442 is about 271.1856500356.

The spelling of 19943442 in words is "nineteen million, nine hundred forty-three thousand, four hundred forty-two".