19961444 has 24 divisors (see below), whose sum is σ = 35722848. Its totient is φ = 9757440.

The previous prime is 19961441. The next prime is 19961471. The reversal of 19961444 is 44416991.

It is a junction number, because it is equal to n+sod(n) for n = 19961398 and 19961407.

It is not an unprimeable number, because it can be changed into a prime (19961441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56372 + ... + 56724.

It is an arithmetic number, because the mean of its divisors is an integer number (1488452).

Almost surely, 2^19961444 is an apocalyptic number.

It is an amenable number.

19961444 is a deficient number, since it is larger than the sum of its proper divisors (15761404).

19961444 is a wasteful number, since it uses less digits than its factorization.

19961444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635 (or 633 counting only the distinct ones).

The product of its digits is 31104, while the sum is 38.

The square root of 19961444 is about 4467.8231836097. The cubic root of 19961444 is about 271.2672209755.

The spelling of 19961444 in words is "nineteen million, nine hundred sixty-one thousand, four hundred forty-four".