12993520 has 20 divisors (see below), whose sum is σ = 30210120. Its totient is φ = 5197376.

The previous prime is 12993509. The next prime is 12993571. The reversal of 12993520 is 2539921.

It is a tau number, because it is divible by the number of its divisors (20).

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 3 ways as a sum of consecutive naturals, for example, 81130 + ... + 81289.

It is an arithmetic number, because the mean of its divisors is an integer number (1510506).

Almost surely, 2^12993520 is an apocalyptic number.

12993520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12993520 is an abundant number, since it is smaller than the sum of its proper divisors (17216600).

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

12993520 is a wasteful number, since it uses less digits than its factorization.

12993520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162432 (or 162426 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 12993520 is about 3604.6525491370. The cubic root of 12993520 is about 235.0943939487.

The spelling of 12993520 in words is "twelve million, nine hundred ninety-three thousand, five hundred twenty".