21712454504 has 24 divisors (see below), whose sum is σ = 43845490710. Its totient is φ = 10020439296.

The previous prime is 21712454473. The next prime is 21712454527. The reversal of 21712454504 is 40545421712.

It can be written as a sum of positive squares in 3 ways, for example, as 21570796900 + 141657604 = 146870^2 + 11902^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1495472 + ... + 1509920.

Almost surely, 2^21712454504 is an apocalyptic number.

It is an amenable number.

21712454504 is an abundant number, since it is smaller than the sum of its proper divisors (22133036206).

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

21712454504 is an frugal number, since it uses more digits than its factorization.

21712454504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28917 (or 14464 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 35.

The spelling of 21712454504 in words is "twenty-one billion, seven hundred twelve million, four hundred fifty-four thousand, five hundred four".