9421817972004 has 27 divisors (see below), whose sum is σ = 23816308650043. Its totient is φ = 3140599851672.

The previous prime is 9421817971963. The next prime is 9421817972051. The reversal of 9421817972004 is 4002797181249.

The square root of 9421817972004 is 3069498.

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

9421817972004 is a `hidden beast` number, since 9 + 421 + 8 + 1 + 7 + 9 + 7 + 200 + 4 = 666.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 18161197 + ... + 18672779.

Almost surely, 2^{9421817972004} is an apocalyptic number.

9421817972004 is the 3069498-th square number.

It is an amenable number.

9421817972004 is an abundant number, since it is smaller than the sum of its proper divisors (14394490678039).

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

9421817972004 is an frugal number, since it uses more digits than its factorization.

9421817972004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023176 (or 511588 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The spelling of 9421817972004 in words is "nine trillion, four hundred twenty-one billion, eight hundred seventeen million, nine hundred seventy-two thousand, four".