21373602205444 has 24 divisors (see below), whose sum is σ = 37422198253440. Its totient is φ = 10681546080096.

The previous prime is 21373602205409. The next prime is 21373602205471. The reversal of 21373602205444 is 44450220637312.

It is a self number, because there is not a number n which added to its sum of digits gives 21373602205444.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203298339 + ... + 203403445.

It is an arithmetic number, because the mean of its divisors is an integer number (1559258260560).

Almost surely, 2^{21373602205444} is an apocalyptic number.

It is an amenable number.

21373602205444 is a deficient number, since it is larger than the sum of its proper divisors (16048596047996).

21373602205444 is a wasteful number, since it uses less digits than its factorization.

21373602205444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129627 (or 129625 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 43.

The spelling of 21373602205444 in words is "twenty-one trillion, three hundred seventy-three billion, six hundred two million, two hundred five thousand, four hundred forty-four".