21352108 has 12 divisors (see below), whose sum is σ = 38376352. Its totient is φ = 10387440.

The previous prime is 21352099. The next prime is 21352109. The reversal of 21352108 is 80125312.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (21352109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71988 + ... + 72283.

Almost surely, 2^21352108 is an apocalyptic number.

It is an amenable number.

21352108 is a deficient number, since it is larger than the sum of its proper divisors (17024244).

21352108 is a wasteful number, since it uses less digits than its factorization.

21352108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144312 (or 144310 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 21352108 is about 4620.8341238352. The cubic root of 21352108 is about 277.4258460521.

The spelling of 21352108 in words is "twenty-one million, three hundred fifty-two thousand, one hundred eight".