13031220020 has 48 divisors (see below), whose sum is σ = 33680696448. Its totient is φ = 4124165760.

The previous prime is 13031220011. The next prime is 13031220023. The reversal of 13031220020 is 2002213031.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 13031219977 and 13031220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13031220023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3578186 + ... + 3581825.

It is an arithmetic number, because the mean of its divisors is an integer number (701681176).

Almost surely, 2^13031220020 is an apocalyptic number.

13031220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13031220020 is an abundant number, since it is smaller than the sum of its proper divisors (20649476428).

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

13031220020 is a wasteful number, since it uses less digits than its factorization.

13031220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7160040 (or 7160038 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 13031220020 its reverse (2002213031), we get a palindrome (15033433051).

The spelling of 13031220020 in words is "thirteen billion, thirty-one million, two hundred twenty thousand, twenty".