21341236 has 12 divisors (see below), whose sum is σ = 42682528. Its totient is φ = 9146232.

The previous prime is 21341191. The next prime is 21341249. The reversal of 21341236 is 63214312.

21341236 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381066 + ... + 381121.

Almost surely, 2^21341236 is an apocalyptic number.

It is an amenable number.

21341236 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21341236 is a wasteful number, since it uses less digits than its factorization.

21341236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762198 (or 762196 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

The square root of 21341236 is about 4619.6575630668. The cubic root of 21341236 is about 277.3787517814.

Adding to 21341236 its reverse (63214312), we get a palindrome (84555548).

The spelling of 21341236 in words is "twenty-one million, three hundred forty-one thousand, two hundred thirty-six".