21437838204704 has 24 divisors (see below), whose sum is σ = 42343221978288. Its totient is φ = 10684004051520.

The previous prime is 21437838204697. The next prime is 21437838204707. The reversal of 21437838204704 is 40740283873412.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21437838204707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1091085362 + ... + 1091105009.

It is an arithmetic number, because the mean of its divisors is an integer number (1764300915762).

Almost surely, 2^{21437838204704} is an apocalyptic number.

It is an amenable number.

21437838204704 is a deficient number, since it is larger than the sum of its proper divisors (20905383773584).

21437838204704 is a wasteful number, since it uses less digits than its factorization.

21437838204704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2182190688 (or 2182190680 counting only the distinct ones).

The product of its (nonzero) digits is 7225344, while the sum is 53.

The spelling of 21437838204704 in words is "twenty-one trillion, four hundred thirty-seven billion, eight hundred thirty-eight million, two hundred four thousand, seven hundred four".