20123212319 has 4 divisors (see below), whose sum is σ = 22997956944. Its totient is φ = 17248467696.

The previous prime is 20123212289. The next prime is 20123212327. The reversal of 20123212319 is 91321232102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20123212319 - 2²⁴ = 20106435103 is a prime.

It is a super-2 number, since 2×20123212319² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123212019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1437372302 + ... + 1437372315.

It is an arithmetic number, because the mean of its divisors is an integer number (5749489236).

Almost surely, 2^20123212319 is an apocalyptic number.

20123212319 is a deficient number, since it is larger than the sum of its proper divisors (2874744625).

20123212319 is an equidigital number, since it uses as much as digits as its factorization.

20123212319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2874744624.

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 20123212319 in words is "twenty billion, one hundred twenty-three million, two hundred twelve thousand, three hundred nineteen".