21035018 has 32 divisors (see below), whose sum is σ = 35852544. Its totient is φ = 9199872.

The previous prime is 21034999. The next prime is 21035029. The reversal of 21035018 is 81053012.

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, 28571 + ... + 29297.

It is an arithmetic number, because the mean of its divisors is an integer number (1120392).

Almost surely, 2^21035018 is an apocalyptic number.

21035018 is a deficient number, since it is larger than the sum of its proper divisors (14817526).

21035018 is a wasteful number, since it uses less digits than its factorization.

21035018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 21035018 is about 4586.3948805135. The cubic root of 21035018 is about 276.0456848692.

The spelling of 21035018 in words is "twenty-one million, thirty-five thousand, eighteen".