20013232131031 has 4 divisors (see below), whose sum is σ = 20037549546352. Its totient is φ = 19988914715712.

The previous prime is 20013232130951. The next prime is 20013232131049. The reversal of 20013232131031 is 13013123231002.

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 20013232131031 - 2³⁵ = 19978872392663 is a prime.

It is a super-2 number, since 2×20013232131031² (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 = 20013232130993 and 20013232131011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013232131131) 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, 12158706426 + ... + 12158708071.

It is an arithmetic number, because the mean of its divisors is an integer number (5009387386588).

Almost surely, 2^{20013232131031} is an apocalyptic number.

20013232131031 is a deficient number, since it is larger than the sum of its proper divisors (24317415321).

20013232131031 is an equidigital number, since it uses as much as digits as its factorization.

20013232131031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24317415320.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 20013232131031 its reverse (13013123231002), we get a palindrome (33026355362033).

The spelling of 20013232131031 in words is "twenty trillion, thirteen billion, two hundred thirty-two million, one hundred thirty-one thousand, thirty-one".