21241392898 has 16 divisors (see below), whose sum is σ = 34765157376. Its totient is φ = 9653369040.

The previous prime is 21241392881. The next prime is 21241392901. The reversal of 21241392898 is 89829314212.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 33340 + ... + 208792.

It is an arithmetic number, because the mean of its divisors is an integer number (2172822336).

Almost surely, 2^21241392898 is an apocalyptic number.

21241392898 is a deficient number, since it is larger than the sum of its proper divisors (13523764478).

21241392898 is a wasteful number, since it uses less digits than its factorization.

21241392898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180969.

The product of its digits is 497664, while the sum is 49.

The spelling of 21241392898 in words is "twenty-one billion, two hundred forty-one million, three hundred ninety-two thousand, eight hundred ninety-eight".