19969443 has 16 divisors (see below), whose sum is σ = 31860640. Its totient is φ = 12288672.

The previous prime is 19969423. The next prime is 19969459. The reversal of 19969443 is 34496991.

It is not a de Polignac number, because 19969443 - 2¹² = 19965347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19969423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28096 + ... + 28797.

It is an arithmetic number, because the mean of its divisors is an integer number (1991290).

Almost surely, 2^19969443 is an apocalyptic number.

19969443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

19969443 is a deficient number, since it is larger than the sum of its proper divisors (11891197).

19969443 is a wasteful number, since it uses less digits than its factorization.

19969443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56915 (or 56909 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 19969443 is about 4468.7182726146. The cubic root of 19969443 is about 271.3034504308.

The spelling of 19969443 in words is "nineteen million, nine hundred sixty-nine thousand, four hundred forty-three".