13731020 has 12 divisors (see below), whose sum is σ = 28835184. Its totient is φ = 5492400.

The previous prime is 13731017. The next prime is 13731031. The reversal of 13731020 is 2013731.

It is a self number, because there is not a number n which added to its sum of digits gives 13731020.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343256 + ... + 343295.

It is an arithmetic number, because the mean of its divisors is an integer number (2402932).

Almost surely, 2^13731020 is an apocalyptic number.

13731020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13731020 is an abundant number, since it is smaller than the sum of its proper divisors (15104164).

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

13731020 is a wasteful number, since it uses less digits than its factorization.

13731020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686560 (or 686558 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 17.

The square root of 13731020 is about 3705.5390970816. The cubic root of 13731020 is about 239.4607103986.

Adding to 13731020 its reverse (2013731), we get a palindrome (15744751).

The spelling of 13731020 in words is "thirteen million, seven hundred thirty-one thousand, twenty".