19961304 has 32 divisors (see below), whose sum is σ = 54440640. Its totient is φ = 6048800.

The previous prime is 19961287. The next prime is 19961317. The reversal of 19961304 is 40316991.

It is a Harshad number since it is a multiple of its sum of digits (33).

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 7 ways as a sum of consecutive naturals, for example, 37542 + ... + 38069.

It is an arithmetic number, because the mean of its divisors is an integer number (1701270).

Almost surely, 2^19961304 is an apocalyptic number.

It is an amenable number.

19961304 is an abundant number, since it is smaller than the sum of its proper divisors (34479336).

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

19961304 is a wasteful number, since it uses less digits than its factorization.

19961304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75631 (or 75627 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 19961304 is about 4467.8075159971. The cubic root of 19961304 is about 271.2665867946.

The spelling of 19961304 in words is "nineteen million, nine hundred sixty-one thousand, three hundred four".