21536108 has 12 divisors (see below), whose sum is σ = 41114472. Its totient is φ = 9789120.

The previous prime is 21536107. The next prime is 21536113. The reversal of 21536108 is 80163512.

It is not an unprimeable number, because it can be changed into a prime (21536107) 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, 244685 + ... + 244772.

It is an arithmetic number, because the mean of its divisors is an integer number (3426206).

Almost surely, 2^21536108 is an apocalyptic number.

It is an amenable number.

21536108 is a deficient number, since it is larger than the sum of its proper divisors (19578364).

21536108 is a wasteful number, since it uses less digits than its factorization.

21536108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489472 (or 489470 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 21536108 is about 4640.7012401145. The cubic root of 21536108 is about 278.2204658685.

The spelling of 21536108 in words is "twenty-one million, five hundred thirty-six thousand, one hundred eight".