21900316 has 12 divisors (see below), whose sum is σ = 38358432. Its totient is φ = 10940768.

The previous prime is 21900313. The next prime is 21900341. The reversal of 21900316 is 61300912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21900313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7341 + ... + 9883.

It is an arithmetic number, because the mean of its divisors is an integer number (3196536).

Almost surely, 2^21900316 is an apocalyptic number.

It is an amenable number.

21900316 is a deficient number, since it is larger than the sum of its proper divisors (16458116).

21900316 is a wasteful number, since it uses less digits than its factorization.

21900316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4700 (or 4698 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 21900316 is about 4679.7773451309. Note that the first 3 decimals coincide. The cubic root of 21900316 is about 279.7800824196.

The spelling of 21900316 in words is "twenty-one million, nine hundred thousand, three hundred sixteen".