20313312 has 24 divisors (see below), whose sum is σ = 53322696. Its totient is φ = 6771072.

The previous prime is 20313281. The next prime is 20313343. The reversal of 20313312 is 21331302.

It is an interprime number because it is at equal distance from previous prime (20313281) and next prime (20313343).

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 20313291 and 20313300.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 105703 + ... + 105894.

It is an arithmetic number, because the mean of its divisors is an integer number (2221779).

Almost surely, 2^20313312 is an apocalyptic number.

It is an amenable number.

20313312 is an abundant number, since it is smaller than the sum of its proper divisors (33009384).

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

20313312 is a wasteful number, since it uses less digits than its factorization.

20313312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211610 (or 211602 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 20313312 is about 4507.0291767416. The cubic root of 20313312 is about 272.8518564544.

Adding to 20313312 its reverse (21331302), we get a palindrome (41644614).

The spelling of 20313312 in words is "twenty million, three hundred thirteen thousand, three hundred twelve".