20315004 has 12 divisors (see below), whose sum is σ = 47401704. Its totient is φ = 6771664.

The previous prime is 20314981. The next prime is 20315011. The reversal of 20315004 is 40051302.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 846447 + ... + 846470.

It is an arithmetic number, because the mean of its divisors is an integer number (3950142).

Almost surely, 2^20315004 is an apocalyptic number.

It is an amenable number.

20315004 is an abundant number, since it is smaller than the sum of its proper divisors (27086700).

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

20315004 is a wasteful number, since it uses less digits than its factorization.

20315004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1692924 (or 1692922 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20315004 is about 4507.2168796276. The cubic root of 20315004 is about 272.8594319878.

Adding to 20315004 its reverse (40051302), we get a palindrome (60366306).

The spelling of 20315004 in words is "twenty million, three hundred fifteen thousand, four".