21101049794 has 8 divisors (see below), whose sum is σ = 34528990608. Its totient is φ = 9591386260.

The previous prime is 21101049793. The next prime is 21101049799. The reversal of 21101049794 is 49794010112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21101049793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479569292 + ... + 479569335.

It is an arithmetic number, because the mean of its divisors is an integer number (4316123826).

Almost surely, 2^21101049794 is an apocalyptic number.

21101049794 is a deficient number, since it is larger than the sum of its proper divisors (13427940814).

21101049794 is a wasteful number, since it uses less digits than its factorization.

21101049794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959138640.

The product of its (nonzero) digits is 18144, while the sum is 38.

The spelling of 21101049794 in words is "twenty-one billion, one hundred one million, forty-nine thousand, seven hundred ninety-four".