21946360 has 32 divisors (see below), whose sum is σ = 49617360. Its totient is φ = 8736256.

The previous prime is 21946333. The next prime is 21946369. The reversal of 21946360 is 6364912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21946369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7872 + ... + 10288.

Almost surely, 2^21946360 is an apocalyptic number.

21946360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21946360 is an abundant number, since it is smaller than the sum of its proper divisors (27671000).

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

21946360 is a wasteful number, since it uses less digits than its factorization.

21946360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2655 (or 2651 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 21946360 is about 4684.6942269480. The cubic root of 21946360 is about 279.9760183542.

The spelling of 21946360 in words is "twenty-one million, nine hundred forty-six thousand, three hundred sixty".