21008210498 has 32 divisors (see below), whose sum is σ = 35232418368. Its totient is φ = 9311814400.

The previous prime is 21008210467. The next prime is 21008210507. The reversal of 21008210498 is 89401280012.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2500661 + ... + 2509047.

It is an arithmetic number, because the mean of its divisors is an integer number (1101013074).

Almost surely, 2^21008210498 is an apocalyptic number.

21008210498 is a deficient number, since it is larger than the sum of its proper divisors (14224207870).

21008210498 is a wasteful number, since it uses less digits than its factorization.

21008210498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11218.

The product of its (nonzero) digits is 9216, while the sum is 35.

The spelling of 21008210498 in words is "twenty-one billion, eight million, two hundred ten thousand, four hundred ninety-eight".