21041474 has 16 divisors (see below), whose sum is σ = 33360000. Its totient is φ = 9926064.

The previous prime is 21041453. The next prime is 21041479. The reversal of 21041474 is 47414012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21041479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9527 + ... + 11525.

It is an arithmetic number, because the mean of its divisors is an integer number (2085000).

Almost surely, 2^21041474 is an apocalyptic number.

21041474 is a deficient number, since it is larger than the sum of its proper divisors (12318526).

21041474 is a wasteful number, since it uses less digits than its factorization.

21041474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2297.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 21041474 is about 4587.0986472933. The cubic root of 21041474 is about 276.0739229981.

Adding to 21041474 its reverse (47414012), we get a palindrome (68455486).

The spelling of 21041474 in words is "twenty-one million, forty-one thousand, four hundred seventy-four".