21152363 has 8 divisors (see below), whose sum is σ = 21493440. Its totient is φ = 20813760.

The previous prime is 21152333. The next prime is 21152381. The reversal of 21152363 is 36325112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21152363 - 2²² = 16958059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21152333) 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 7 ways as a sum of consecutive naturals, for example, 23681 + ... + 24557.

It is an arithmetic number, because the mean of its divisors is an integer number (2686680).

Almost surely, 2^21152363 is an apocalyptic number.

21152363 is a deficient number, since it is larger than the sum of its proper divisors (341077).

21152363 is an equidigital number, since it uses as much as digits as its factorization.

21152363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237.

The product of its digits is 1080, while the sum is 23.

The square root of 21152363 is about 4599.1698163908. The cubic root of 21152363 is about 276.5580452941.

Adding to 21152363 its reverse (36325112), we get a palindrome (57477475).

The spelling of 21152363 in words is "twenty-one million, one hundred fifty-two thousand, three hundred sixty-three".