520204471998 has 16 divisors (see below), whose sum is σ = 1040672586240. Its totient is φ = 173357550296.

The previous prime is 520204471967. The next prime is 520204472023. The reversal of 520204471998 is 899174402025.

It is a super-2 number, since 2×520204471998² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 520204471998.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10959438 + ... + 11006801.

It is an arithmetic number, because the mean of its divisors is an integer number (65042036640).

Almost surely, 2^520204471998 is an apocalyptic number.

520204471998 is an abundant number, since it is smaller than the sum of its proper divisors (520468114242).

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

520204471998 is a wasteful number, since it uses less digits than its factorization.

520204471998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21970191.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 520204471998 in words is "five hundred twenty billion, two hundred four million, four hundred seventy-one thousand, nine hundred ninety-eight".