13520012031 has 12 divisors (see below), whose sum is σ = 20005221600. Its totient is φ = 8793503520.

The previous prime is 13520012029. The next prime is 13520012063. The reversal of 13520012031 is 13021002531.

It is not a de Polignac number, because 13520012031 - 2¹ = 13520012029 is a prime.

It is a super-2 number, since 2×13520012031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13520011995 and 13520012013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13520012431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18319431 + ... + 18320168.

It is an arithmetic number, because the mean of its divisors is an integer number (1667101800).

Almost surely, 2^13520012031 is an apocalyptic number.

13520012031 is a deficient number, since it is larger than the sum of its proper divisors (6485209569).

13520012031 is a wasteful number, since it uses less digits than its factorization.

13520012031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36639646 (or 36639643 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

Adding to 13520012031 its reverse (13021002531), we get a palindrome (26541014562).

The spelling of 13520012031 in words is "thirteen billion, five hundred twenty million, twelve thousand, thirty-one".