930185020521 has 27 divisors (see below), whose sum is σ = 1427360528503. Its totient is φ = 583614640320.

The previous prime is 930185020511. The next prime is 930185020529. The reversal of 930185020521 is 125020581039.

The square root of 930185020521 is 964461.

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

930185020521 is a `hidden beast` number, since 9 + 30 + 1 + 85 + 0 + 20 + 521 = 666.

It can be written as a sum of positive squares in only one way, i.e., 724192490025 + 205992530496 = 850995^2 + 453864^2 .

It is not a de Polignac number, because 930185020521 - 2⁷ = 930185020393 is a prime.

It is a super-2 number, since 2×930185020521² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (930185020529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 49178056 + ... + 49196966.

Almost surely, 2^930185020521 is an apocalyptic number.

930185020521 is the 964461-st square number.

930185020521 is the 482231-st centered octagonal number.

It is an amenable number.

930185020521 is a deficient number, since it is larger than the sum of its proper divisors (497175507982).

930185020521 is an frugal number, since it uses more digits than its factorization.

930185020521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37862 (or 18931 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

Multiplying 930185020521 by its sum of digits (36), we get a square (33486660738756 = 5786766²).

The spelling of 930185020521 in words is "nine hundred thirty billion, one hundred eighty-five million, twenty thousand, five hundred twenty-one".