19840064 has 28 divisors (see below), whose sum is σ = 40335708. Its totient is φ = 9676800.

The previous prime is 19840049. The next prime is 19840091. The reversal of 19840064 is 46004891.

It can be written as a sum of positive squares in 2 ways, for example, as 2534464 + 17305600 = 1592^2 + 4160^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 19840064.

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, 1157 + ... + 6404.

It is an arithmetic number, because the mean of its divisors is an integer number (1440561).

Almost surely, 2^19840064 is an apocalyptic number.

It is an amenable number.

19840064 is an abundant number, since it is smaller than the sum of its proper divisors (20495644).

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

19840064 is an equidigital number, since it uses as much as digits as its factorization.

19840064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7614 (or 7604 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 19840064 is about 4454.2186744703. The cubic root of 19840064 is about 270.7162691764.

The spelling of 19840064 in words is "nineteen million, eight hundred forty thousand, sixty-four".