19320144 has 20 divisors (see below), whose sum is σ = 49910496. Its totient is φ = 6440032.

The previous prime is 19320101. The next prime is 19320157. The reversal of 19320144 is 44102391.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201204 + ... + 201299.

Almost surely, 2^19320144 is an apocalyptic number.

It is an amenable number.

19320144 is an abundant number, since it is smaller than the sum of its proper divisors (30590352).

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

19320144 is a wasteful number, since it uses less digits than its factorization.

19320144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402514 (or 402508 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 19320144 is about 4395.4685757038. The cubic root of 19320144 is about 268.3305492898.

The spelling of 19320144 in words is "nineteen million, three hundred twenty thousand, one hundred forty-four".