20013120331331 has 8 divisors (see below), whose sum is σ = 20060700102144. Its totient is φ = 19965545865160.

The previous prime is 20013120331291. The next prime is 20013120331339. The reversal of 20013120331331 is 13313302131002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20013120331331 is a prime.

It is a super-2 number, since 2×20013120331331² (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 = 20013120331297 and 20013120331306.

It is not an unprimeable number, because it can be changed into a prime (20013120331339) 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, 6280106 + ... + 8914368.

It is an arithmetic number, because the mean of its divisors is an integer number (2507587512768).

Almost surely, 2^{20013120331331} is an apocalyptic number.

20013120331331 is a deficient number, since it is larger than the sum of its proper divisors (47579770813).

20013120331331 is a wasteful number, since it uses less digits than its factorization.

20013120331331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2652321.

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

Adding to 20013120331331 its reverse (13313302131002), we get a palindrome (33326422462333).

The spelling of 20013120331331 in words is "twenty trillion, thirteen billion, one hundred twenty million, three hundred thirty-one thousand, three hundred thirty-one".