21916336 has 20 divisors (see below), whose sum is σ = 45729712. Its totient is φ = 10115136.

The previous prime is 21916333. The next prime is 21916337. The reversal of 21916336 is 63361912.

It is a junction number, because it is equal to n+sod(n) for n = 21916298 and 21916307.

It is not an unprimeable number, because it can be changed into a prime (21916331) 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, 52476 + ... + 52891.

Almost surely, 2^21916336 is an apocalyptic number.

21916336 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21916336 is an abundant number, since it is smaller than the sum of its proper divisors (23813376).

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

21916336 is a wasteful number, since it uses less digits than its factorization.

21916336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105388 (or 105382 counting only the distinct ones).

The product of its digits is 5832, while the sum is 31.

The square root of 21916336 is about 4681.4886521277. The cubic root of 21916336 is about 279.8482851568.

The spelling of 21916336 in words is "twenty-one million, nine hundred sixteen thousand, three hundred thirty-six".