20013120144231 has 4 divisors (see below), whose sum is σ = 26684160192312. Its totient is φ = 13342080096152.

The previous prime is 20013120144197. The next prime is 20013120144287. The reversal of 20013120144231 is 13244102131002.

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 20013120144231 - 2⁷ = 20013120144103 is a prime.

It is a super-2 number, since 2×20013120144231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013120144331) 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, 3335520024036 + ... + 3335520024041.

It is an arithmetic number, because the mean of its divisors is an integer number (6671040048078).

Almost surely, 2^{20013120144231} is an apocalyptic number.

20013120144231 is a deficient number, since it is larger than the sum of its proper divisors (6671040048081).

20013120144231 is an equidigital number, since it uses as much as digits as its factorization.

20013120144231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6671040048080.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 20013120144231 its reverse (13244102131002), we get a palindrome (33257222275233).

The spelling of 20013120144231 in words is "twenty trillion, thirteen billion, one hundred twenty million, one hundred forty-four thousand, two hundred thirty-one".