20123023212013 has 8 divisors (see below), whose sum is σ = 20157043579256. Its totient is φ = 20089006732800.

The previous prime is 20123023212007. The next prime is 20123023212049. The reversal of 20123023212013 is 31021232032102.

It can be written as a sum of positive squares in 4 ways, for example, as 2169133948804 + 17953889263209 = 1472798^2 + 4237203^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20123023212013 - 2⁵ = 20123023211981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123023212053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9482953 + ... + 11409313.

It is an arithmetic number, because the mean of its divisors is an integer number (2519630447407).

Almost surely, 2^{20123023212013} is an apocalyptic number.

It is an amenable number.

20123023212013 is a deficient number, since it is larger than the sum of its proper divisors (34020367243).

20123023212013 is a wasteful number, since it uses less digits than its factorization.

20123023212013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944015.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 20123023212013 its reverse (31021232032102), we get a palindrome (51144255244115).

The spelling of 20123023212013 in words is "twenty trillion, one hundred twenty-three billion, twenty-three million, two hundred twelve thousand, thirteen".