12933638 has 4 divisors (see below), whose sum is σ = 19400460. Its totient is φ = 6466818.

The previous prime is 12933637. The next prime is 12933671. The reversal of 12933638 is 83633921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83633921 = 7 ⋅11947703.

It is a junction number, because it is equal to n+sod(n) for n = 12933598 and 12933607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12933631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3233408 + ... + 3233411.

It is an arithmetic number, because the mean of its divisors is an integer number (4850115).

Almost surely, 2^12933638 is an apocalyptic number.

12933638 is a deficient number, since it is larger than the sum of its proper divisors (6466822).

12933638 is an equidigital number, since it uses as much as digits as its factorization.

12933638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6466821.

The product of its digits is 23328, while the sum is 35.

The square root of 12933638 is about 3596.3367473027. The cubic root of 12933638 is about 234.7326853286.

The spelling of 12933638 in words is "twelve million, nine hundred thirty-three thousand, six hundred thirty-eight".