21368358 has 36 divisors (see below), whose sum is σ = 50894844. Its totient is φ = 6474600.

The previous prime is 21368353. The next prime is 21368363. The reversal of 21368358 is 85386312.

It is an interprime number because it is at equal distance from previous prime (21368353) and next prime (21368363).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21368353) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2728 + ... + 7083.

Almost surely, 2^21368358 is an apocalyptic number.

21368358 is an abundant number, since it is smaller than the sum of its proper divisors (29526486).

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

21368358 is a wasteful number, since it uses less digits than its factorization.

21368358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9841 (or 9827 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 21368358 is about 4622.5921299634. The cubic root of 21368358 is about 277.4962064249.

The spelling of 21368358 in words is "twenty-one million, three hundred sixty-eight thousand, three hundred fifty-eight".