19944670 has 8 divisors (see below), whose sum is σ = 35900424. Its totient is φ = 7977864.

The previous prime is 19944667. The next prime is 19944677. The reversal of 19944670 is 7644991.

It is a happy number.

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

It is a super-2 number, since 2×19944670² = 795579722817800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19944677) 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, 997224 + ... + 997243.

It is an arithmetic number, because the mean of its divisors is an integer number (4487553).

Almost surely, 2^19944670 is an apocalyptic number.

19944670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19944670 is a deficient number, since it is larger than the sum of its proper divisors (15955754).

19944670 is a wasteful number, since it uses less digits than its factorization.

19944670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994474.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 19944670 is about 4465.9455885624. The cubic root of 19944670 is about 271.1912159278.

The spelling of 19944670 in words is "nineteen million, nine hundred forty-four thousand, six hundred seventy".