21362042 has 32 divisors (see below), whose sum is σ = 36832320. Its totient is φ = 9210240.

The previous prime is 21362041. The next prime is 21362057. The reversal of 21362042 is 24026312.

It is not an unprimeable number, because it can be changed into a prime (21362041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40742 + ... + 41262.

It is an arithmetic number, because the mean of its divisors is an integer number (1151010).

Almost surely, 2^21362042 is an apocalyptic number.

21362042 is a deficient number, since it is larger than the sum of its proper divisors (15470278).

21362042 is a wasteful number, since it uses less digits than its factorization.

21362042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 21362042 is about 4621.9089129926. The cubic root of 21362042 is about 277.4688632110.

Adding to 21362042 its reverse (24026312), we get a palindrome (45388354).

The spelling of 21362042 in words is "twenty-one million, three hundred sixty-two thousand, forty-two".