13021630 has 8 divisors (see below), whose sum is σ = 23438952. Its totient is φ = 5208648.

The previous prime is 13021607. The next prime is 13021633. The reversal of 13021630 is 3612031.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 651072 + ... + 651091.

It is an arithmetic number, because the mean of its divisors is an integer number (2929869).

Almost surely, 2^13021630 is an apocalyptic number.

13021630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13021630 is a deficient number, since it is larger than the sum of its proper divisors (10417322).

13021630 is a wasteful number, since it uses less digits than its factorization.

13021630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302170.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 13021630 is about 3608.5495701182. The cubic root of 13021630 is about 235.2638051514.

Adding to 13021630 its reverse (3612031), we get a palindrome (16633661).

The spelling of 13021630 in words is "thirteen million, twenty-one thousand, six hundred thirty".