13163720 has 32 divisors (see below), whose sum is σ = 29790720. Its totient is φ = 5234880.

The previous prime is 13163707. The next prime is 13163741. The reversal of 13163720 is 2736131.

13163720 = 500² + 501² + ... + 547².

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6779 + ... + 8501.

It is an arithmetic number, because the mean of its divisors is an integer number (930960).

Almost surely, 2^13163720 is an apocalyptic number.

13163720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13163720 is an abundant number, since it is smaller than the sum of its proper divisors (16627000).

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

13163720 is a wasteful number, since it uses less digits than its factorization.

13163720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1925 (or 1921 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 13163720 is about 3628.1841188121. The cubic root of 13163720 is about 236.1164320626.

Adding to 13163720 its reverse (2736131), we get a palindrome (15899851).

The spelling of 13163720 in words is "thirteen million, one hundred sixty-three thousand, seven hundred twenty".