20123410021013 has 6 divisors (see below), whose sum is σ = 21790438070274. Its totient is φ = 18575455403856.

The previous prime is 20123410021007. The next prime is 20123410021027. The reversal of 20123410021013 is 31012001432102.

It can be written as a sum of positive squares in 3 ways, for example, as 849536420209 + 19273873600804 = 921703^2 + 4390202^2 .

It is not a de Polignac number, because 20123410021013 - 2⁶ = 20123410020949 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 (20123410021073) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59536715870 + ... + 59536716207.

It is an arithmetic number, because the mean of its divisors is an integer number (3631739678379).

Almost surely, 2^{20123410021013} is an apocalyptic number.

It is an amenable number.

20123410021013 is a deficient number, since it is larger than the sum of its proper divisors (1667028049261).

20123410021013 is a wasteful number, since it uses less digits than its factorization.

20123410021013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119073432103 (or 119073432090 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 20123410021013 its reverse (31012001432102), we get a palindrome (51135411453115).

The spelling of 20123410021013 in words is "twenty trillion, one hundred twenty-three billion, four hundred ten million, twenty-one thousand, thirteen".