20123413513 has 16 divisors (see below), whose sum is σ = 24240718720. Its totient is φ = 16319149056.

The previous prime is 20123413511. The next prime is 20123413543. The reversal of 20123413513 is 31531432102.

It is a happy number.

It is not a de Polignac number, because 20123413513 - 2¹ = 20123413511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20123413511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 745 + ... + 200617.

It is an arithmetic number, because the mean of its divisors is an integer number (1515044920).

Almost surely, 2^20123413513 is an apocalyptic number.

It is an amenable number.

20123413513 is a deficient number, since it is larger than the sum of its proper divisors (4117305207).

20123413513 is a wasteful number, since it uses less digits than its factorization.

20123413513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200656.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 20123413513 its reverse (31531432102), we get a palindrome (51654845615).

The spelling of 20123413513 in words is "twenty billion, one hundred twenty-three million, four hundred thirteen thousand, five hundred thirteen".