20312319 has 16 divisors (see below), whose sum is σ = 28062720. Its totient is φ = 13060320.

The previous prime is 20312309. The next prime is 20312351. The reversal of 20312319 is 91321302.

It is a happy number.

It is not a de Polignac number, because 20312319 - 2⁷ = 20312191 is a prime.

It is a super-2 number, since 2×20312319² = 825180606315522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20312295 and 20312304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312309) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 8997 + ... + 11025.

It is an arithmetic number, because the mean of its divisors is an integer number (1753920).

Almost surely, 2^20312319 is an apocalyptic number.

20312319 is a deficient number, since it is larger than the sum of its proper divisors (7750401).

20312319 is a wasteful number, since it uses less digits than its factorization.

20312319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2150.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 20312319 is about 4506.9190141382. The cubic root of 20312319 is about 272.8474103337.

The spelling of 20312319 in words is "twenty million, three hundred twelve thousand, three hundred nineteen".