21470823530244 has 81 divisors (see below), whose sum is σ = 59656813268871. Its totient is φ = 6506217487440.

The previous prime is 21470823530239. The next prime is 21470823530279. The reversal of 21470823530244 is 44203532807412.

The square root of 21470823530244 is 4633662.

It is a perfect power (a square), and thus also a powerful number.

21470823530244 is a `hidden beast` number, since 2 + 1 + 4 + 70 + 8 + 2 + 3 + 530 + 2 + 44 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 21470823530244.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 305786589 + ... + 305856795.

Almost surely, 2^{21470823530244} is an apocalyptic number.

21470823530244 is the 4633662-nd square number.

It is an amenable number.

21470823530244 is an abundant number, since it is smaller than the sum of its proper divisors (38185989738627).

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

21470823530244 is an frugal number, since it uses more digits than its factorization.

21470823530244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140446 (or 70223 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 45.

The spelling of 21470823530244 in words is "twenty-one trillion, four hundred seventy billion, eight hundred twenty-three million, five hundred thirty thousand, two hundred forty-four".