20013023311331 has 4 divisors (see below), whose sum is σ = 20013042415752. Its totient is φ = 20013004206912.

The previous prime is 20013023311327. The next prime is 20013023311363. The reversal of 20013023311331 is 13311332031002.

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 20013023311331 - 2² = 20013023311327 is a prime.

It is a super-2 number, since 2×20013023311331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20013023311297 and 20013023311306.

It is not an unprimeable number, because it can be changed into a prime (20013023311381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7883726 + ... + 10108371.

It is an arithmetic number, because the mean of its divisors is an integer number (5003260603938).

Almost surely, 2^{20013023311331} is an apocalyptic number.

20013023311331 is a deficient number, since it is larger than the sum of its proper divisors (19104421).

20013023311331 is a wasteful number, since it uses less digits than its factorization.

20013023311331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19104420.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 20013023311331 its reverse (13311332031002), we get a palindrome (33324355342333).

The spelling of 20013023311331 in words is "twenty trillion, thirteen billion, twenty-three million, three hundred eleven thousand, three hundred thirty-one".