20312123319 has 12 divisors (see below), whose sum is σ = 29377699416. Its totient is φ = 13523892912.

The previous prime is 20312123317. The next prime is 20312123357. The reversal of 20312123319 is 91332121302.

20312123319 is a `hidden beast` number, since 2 + 0 + 312 + 12 + 331 + 9 = 666.

It is not a de Polignac number, because 20312123319 - 2¹ = 20312123317 is a prime.

It is a super-2 number, since 2×20312123319² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20312123292 and 20312123301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312123317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1452877 + ... + 1466790.

It is an arithmetic number, because the mean of its divisors is an integer number (2448141618).

Almost surely, 2^20312123319 is an apocalyptic number.

20312123319 is a deficient number, since it is larger than the sum of its proper divisors (9065576097).

20312123319 is a wasteful number, since it uses less digits than its factorization.

20312123319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2920446 (or 2920443 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The spelling of 20312123319 in words is "twenty billion, three hundred twelve million, one hundred twenty-three thousand, three hundred nineteen".