21048818 has 32 divisors (see below), whose sum is σ = 38016000. Its totient is φ = 8545680.

The previous prime is 21048803. The next prime is 21048829. The reversal of 21048818 is 81884012.

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, 41933 + ... + 42431.

It is an arithmetic number, because the mean of its divisors is an integer number (1188000).

Almost surely, 2^21048818 is an apocalyptic number.

21048818 is a deficient number, since it is larger than the sum of its proper divisors (16967182).

21048818 is a wasteful number, since it uses less digits than its factorization.

21048818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662.

The product of its (nonzero) digits is 4096, while the sum is 32.

The square root of 21048818 is about 4587.8990834586. The cubic root of 21048818 is about 276.1060381603.

The spelling of 21048818 in words is "twenty-one million, forty-eight thousand, eight hundred eighteen".