21371108 has 24 divisors (see below), whose sum is σ = 43200864. Its totient is φ = 9142400.

The previous prime is 21371107. The next prime is 21371113. The reversal of 21371108 is 80117312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21371101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13538 + ... + 15033.

It is an arithmetic number, because the mean of its divisors is an integer number (1800036).

Almost surely, 2^21371108 is an apocalyptic number.

It is an amenable number.

21371108 is an abundant number, since it is smaller than the sum of its proper divisors (21829756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21371108 is a wasteful number, since it uses less digits than its factorization.

21371108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28603 (or 28601 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 21371108 is about 4622.8895725509. The cubic root of 21371108 is about 277.5081100354.

The spelling of 21371108 in words is "twenty-one million, three hundred seventy-one thousand, one hundred eight".