19812944 has 20 divisors (see below), whose sum is σ = 39205824. Its totient is φ = 9695328.

The previous prime is 19812943. The next prime is 19812971. The reversal of 19812944 is 44921891.

It is a super-3 number, since 3×19812944³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19812898 and 19812907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19812943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12422 + ... + 13925.

Almost surely, 2^19812944 is an apocalyptic number.

It is an amenable number.

19812944 is a deficient number, since it is larger than the sum of its proper divisors (19392880).

19812944 is a wasteful number, since it uses less digits than its factorization.

19812944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26402 (or 26396 counting only the distinct ones).

The product of its digits is 20736, while the sum is 38.

The square root of 19812944 is about 4451.1733284607. The cubic root of 19812944 is about 270.5928627697.

The spelling of 19812944 in words is "nineteen million, eight hundred twelve thousand, nine hundred forty-four".