21289469104 has 40 divisors (see below), whose sum is σ = 44739980208. Its totient is φ = 9774213120.

The previous prime is 21289469101. The next prime is 21289469137. The reversal of 21289469104 is 40196498212.

It is not an unprimeable number, because it can be changed into a prime (21289469101) by changing a digit.

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, 943362 + ... + 965665.

Almost surely, 2^21289469104 is an apocalyptic number.

It is an amenable number.

21289469104 is an abundant number, since it is smaller than the sum of its proper divisors (23450511104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21289469104 is a wasteful number, since it uses less digits than its factorization.

21289469104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1909093 (or 1909087 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 46.

The spelling of 21289469104 in words is "twenty-one billion, two hundred eighty-nine million, four hundred sixty-nine thousand, one hundred four".