21105062 has 12 divisors (see below), whose sum is σ = 34797588. Its totient is φ = 9593100.

The previous prime is 21105047. The next prime is 21105107. The reversal of 21105062 is 26050112.

It is a self number, because there is not a number n which added to its sum of digits gives 21105062.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43364 + ... + 43847.

It is an arithmetic number, because the mean of its divisors is an integer number (2899799).

Almost surely, 2^21105062 is an apocalyptic number.

21105062 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21105062 is a deficient number, since it is larger than the sum of its proper divisors (13692526).

21105062 is a wasteful number, since it uses less digits than its factorization.

21105062 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87235 (or 87224 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 21105062 is about 4594.0245972350. The cubic root of 21105062 is about 276.3517446997.

Adding to 21105062 its reverse (26050112), we get a palindrome (47155174).

It can be divided in two parts, 211050 and 62, that added together give a palindrome (211112).

The spelling of 21105062 in words is "twenty-one million, one hundred five thousand, sixty-two".