13251031020 has 36 divisors (see below), whose sum is σ = 40194794640. Its totient is φ = 3533608224.

The previous prime is 13251030979. The next prime is 13251031063. The reversal of 13251031020 is 2013015231.

13251031020 is a `hidden beast` number, since 1 + 325 + 10 + 310 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 13251030984 and 13251031002.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36808240 + ... + 36808599.

Almost surely, 2^13251031020 is an apocalyptic number.

13251031020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13251031020 is an abundant number, since it is smaller than the sum of its proper divisors (26943763620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13251031020 is a wasteful number, since it uses less digits than its factorization.

13251031020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73616854 (or 73616849 counting only the distinct ones).

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

Adding to 13251031020 its reverse (2013015231), we get a palindrome (15264046251).

The spelling of 13251031020 in words is "thirteen billion, two hundred fifty-one million, thirty-one thousand, twenty".