21354108 has 24 divisors (see below), whose sum is σ = 52757712. Its totient is φ = 6699264.

The previous prime is 21354107. The next prime is 21354139. The reversal of 21354108 is 80145312.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21354103) 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, 52135 + ... + 52542.

It is an arithmetic number, because the mean of its divisors is an integer number (2198238).

Almost surely, 2^21354108 is an apocalyptic number.

It is an amenable number.

21354108 is an abundant number, since it is smaller than the sum of its proper divisors (31403604).

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

21354108 is a wasteful number, since it uses less digits than its factorization.

21354108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104701 (or 104699 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 21354108 is about 4621.0505299120. The cubic root of 21354108 is about 277.4345077163.

The spelling of 21354108 in words is "twenty-one million, three hundred fifty-four thousand, one hundred eight".