21373471576164 has 48 divisors (see below), whose sum is σ = 53473465785600. Its totient is φ = 6620524325376.

The previous prime is 21373471576159. The next prime is 21373471576241. The reversal of 21373471576164 is 46167517437312.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 663097299 + ... + 663129530.

It is an arithmetic number, because the mean of its divisors is an integer number (1114030537200).

Almost surely, 2^{21373471576164} is an apocalyptic number.

It is an amenable number.

21373471576164 is an abundant number, since it is smaller than the sum of its proper divisors (32099994209436).

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

21373471576164 is a wasteful number, since it uses less digits than its factorization.

21373471576164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326226932 (or 1326226930 counting only the distinct ones).

The product of its digits is 17781120, while the sum is 57.

The spelling of 21373471576164 in words is "twenty-one trillion, three hundred seventy-three billion, four hundred seventy-one million, five hundred seventy-six thousand, one hundred sixty-four".