21410818 has 32 divisors (see below), whose sum is σ = 38630592. Its totient is φ = 8769600.

The previous prime is 21410791. The next prime is 21410833. The reversal of 21410818 is 81801412.

It is a junction number, because it is equal to n+sod(n) for n = 21410792 and 21410801.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11428 + ... + 13168.

It is an arithmetic number, because the mean of its divisors is an integer number (1207206).

Almost surely, 2^21410818 is an apocalyptic number.

21410818 is a deficient number, since it is larger than the sum of its proper divisors (17219774).

21410818 is a wasteful number, since it uses less digits than its factorization.

21410818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810.

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 21410818 is about 4627.1825120693. The cubic root of 21410818 is about 277.6798844501.

The spelling of 21410818 in words is "twenty-one million, four hundred ten thousand, eight hundred eighteen".