31113020013 has 8 divisors (see below), whose sum is σ = 41493352128. Its totient is φ = 20737350624.

The previous prime is 31113020009. The next prime is 31113020039. The reversal of 31113020013 is 31002031113.

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

It is not a de Polignac number, because 31113020013 - 2² = 31113020009 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31113019974 and 31113020001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31113020083) 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, 1150081 + ... + 1176822.

It is an arithmetic number, because the mean of its divisors is an integer number (5186669016).

Almost surely, 2^31113020013 is an apocalyptic number.

It is an amenable number.

31113020013 is a deficient number, since it is larger than the sum of its proper divisors (10380332115).

31113020013 is a wasteful number, since it uses less digits than its factorization.

31113020013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2331363.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 31113020013 its reverse (31002031113), we get a palindrome (62115051126).

The spelling of 31113020013 in words is "thirty-one billion, one hundred thirteen million, twenty thousand, thirteen".