21173724470004 has 12 divisors (see below), whose sum is σ = 49405357096704. Its totient is φ = 7057908156664.

The previous prime is 21173724469991. The next prime is 21173724470033. The reversal of 21173724470004 is 40007442737112.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 882238519572 + ... + 882238519595.

It is an arithmetic number, because the mean of its divisors is an integer number (4117113091392).

Almost surely, 2^{21173724470004} is an apocalyptic number.

It is an amenable number.

21173724470004 is an abundant number, since it is smaller than the sum of its proper divisors (28231632626700).

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

21173724470004 is a wasteful number, since it uses less digits than its factorization.

21173724470004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1764477039174 (or 1764477039172 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 42.

The spelling of 21173724470004 in words is "twenty-one trillion, one hundred seventy-three billion, seven hundred twenty-four million, four hundred seventy thousand, four".