21914208 has 36 divisors (see below), whose sum is σ = 62319348. Its totient is φ = 7304640.

The previous prime is 21914197. The next prime is 21914251. The reversal of 21914208 is 80241912.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37758 + ... + 38333.

It is an arithmetic number, because the mean of its divisors is an integer number (1731093).

Almost surely, 2^21914208 is an apocalyptic number.

It is an amenable number.

21914208 is an abundant number, since it is smaller than the sum of its proper divisors (40405140).

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

21914208 is a wasteful number, since it uses less digits than its factorization.

21914208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76107 (or 76096 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 21914208 is about 4681.2613684775. The cubic root of 21914208 is about 279.8392274319.

It can be divided in two parts, 21914 and 208, that added together give a palindrome (22122).

The spelling of 21914208 in words is "twenty-one million, nine hundred fourteen thousand, two hundred eight".