19542144 has 32 divisors (see below), whose sum is σ = 51909840. Its totient is φ = 6513920.

The previous prime is 19542137. The next prime is 19542161. The reversal of 19542144 is 44124591.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 25062 + ... + 25829.

Almost surely, 2^19542144 is an apocalyptic number.

It is an amenable number.

19542144 is an abundant number, since it is smaller than the sum of its proper divisors (32367696).

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

19542144 is an equidigital number, since it uses as much as digits as its factorization.

19542144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50908 (or 50896 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 19542144 is about 4420.6497260018. The cubic root of 19542144 is about 269.3543971588.

The spelling of 19542144 in words is "nineteen million, five hundred forty-two thousand, one hundred forty-four".