20387304 has 96 divisors (see below), whose sum is σ = 66456000. Its totient is φ = 5515776.

The previous prime is 20387287. The next prime is 20387357. The reversal of 20387304 is 40378302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8512 + ... + 10640.

It is an arithmetic number, because the mean of its divisors is an integer number (692250).

Almost surely, 2^20387304 is an apocalyptic number.

20387304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20387304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33228000).

20387304 is an abundant number, since it is smaller than the sum of its proper divisors (46068696).

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

20387304 is a wasteful number, since it uses less digits than its factorization.

20387304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2167 (or 2160 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 20387304 is about 4515.2302266883. The cubic root of 20387304 is about 273.1827460562.

The spelling of 20387304 in words is "twenty million, three hundred eighty-seven thousand, three hundred four".