13020638 has 8 divisors (see below), whose sum is σ = 19655832. Its totient is φ = 6468696.

The previous prime is 13020629. The next prime is 13020641. The reversal of 13020638 is 83602031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 20420 + ... + 21047.

It is an arithmetic number, because the mean of its divisors is an integer number (2456979).

Almost surely, 2^13020638 is an apocalyptic number.

13020638 is a deficient number, since it is larger than the sum of its proper divisors (6635194).

13020638 is a wasteful number, since it uses less digits than its factorization.

13020638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41626.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 13020638 is about 3608.4121161530. The cubic root of 13020638 is about 235.2578307939.

Adding to 13020638 its reverse (83602031), we get a palindrome (96622669).

The spelling of 13020638 in words is "thirteen million, twenty thousand, six hundred thirty-eight".