21041838 has 24 divisors (see below), whose sum is σ = 45688968. Its totient is φ = 6998832.

The previous prime is 21041827. The next prime is 21041857. The reversal of 21041838 is 83814012.

21041838 is a `hidden beast` number, since 210 + 418 + 38 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10081 + ... + 11987.

It is an arithmetic number, because the mean of its divisors is an integer number (1903707).

Almost surely, 2^21041838 is an apocalyptic number.

21041838 is an abundant number, since it is smaller than the sum of its proper divisors (24647130).

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

21041838 is a wasteful number, since it uses less digits than its factorization.

21041838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2528 (or 2525 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 21041838 is about 4587.1383236175. The cubic root of 21041838 is about 276.0755149386.

The spelling of 21041838 in words is "twenty-one million, forty-one thousand, eight hundred thirty-eight".