13213870 has 16 divisors (see below), whose sum is σ = 24017760. Its totient is φ = 5233824.

The previous prime is 13213867. The next prime is 13213901. The reversal of 13213870 is 7831231.

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, 5385 + ... + 7444.

It is an arithmetic number, because the mean of its divisors is an integer number (1501110).

Almost surely, 2^13213870 is an apocalyptic number.

13213870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13213870 is a deficient number, since it is larger than the sum of its proper divisors (10803890).

13213870 is a wasteful number, since it uses less digits than its factorization.

13213870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12939.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 13213870 is about 3635.0887196876. The cubic root of 13213870 is about 236.4158974004.

The spelling of 13213870 in words is "thirteen million, two hundred thirteen thousand, eight hundred seventy".