21362054 has 16 divisors (see below), whose sum is σ = 37138176. Its totient is φ = 9025800.

The previous prime is 21362041. The next prime is 21362057. The reversal of 21362054 is 45026312.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21362057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9752 + ... + 11739.

It is an arithmetic number, because the mean of its divisors is an integer number (2321136).

Almost surely, 2^21362054 is an apocalyptic number.

21362054 is a deficient number, since it is larger than the sum of its proper divisors (15776122).

21362054 is a wasteful number, since it uses less digits than its factorization.

21362054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21571.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 21362054 is about 4621.9102111573. The cubic root of 21362054 is about 277.4689151665.

Adding to 21362054 its reverse (45026312), we get a palindrome (66388366).

The spelling of 21362054 in words is "twenty-one million, three hundred sixty-two thousand, fifty-four".