21362284 has 6 divisors (see below), whose sum is σ = 37384004. Its totient is φ = 10681140.

The previous prime is 21362281. The next prime is 21362287. The reversal of 21362284 is 48226312.

It is an interprime number because it is at equal distance from previous prime (21362281) and next prime (21362287).

It is not an unprimeable number, because it can be changed into a prime (21362281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2670282 + ... + 2670289.

Almost surely, 2^21362284 is an apocalyptic number.

It is an amenable number.

21362284 is a deficient number, since it is larger than the sum of its proper divisors (16021720).

21362284 is a wasteful number, since it uses less digits than its factorization.

21362284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5340575 (or 5340573 counting only the distinct ones).

The product of its digits is 4608, while the sum is 28.

The square root of 21362284 is about 4621.9350925776. The cubic root of 21362284 is about 277.4699109762.

Adding to 21362284 its reverse (48226312), we get a palindrome (69588596).

The spelling of 21362284 in words is "twenty-one million, three hundred sixty-two thousand, two hundred eighty-four".