21047441404 has 96 divisors (see below), whose sum is σ = 42674688000. Its totient is φ = 8989685760.

The previous prime is 21047441369. The next prime is 21047441407. The reversal of 21047441404 is 40414474012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21047441407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14625717 + ... + 14627155.

It is an arithmetic number, because the mean of its divisors is an integer number (444528000).

Almost surely, 2^21047441404 is an apocalyptic number.

It is an amenable number.

21047441404 is an abundant number, since it is smaller than the sum of its proper divisors (21627246596).

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

21047441404 is a wasteful number, since it uses less digits than its factorization.

21047441404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1723 (or 1721 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 31.

The spelling of 21047441404 in words is "twenty-one billion, forty-seven million, four hundred forty-one thousand, four hundred four".