1020005000520 has 128 divisors (see below), whose sum is σ = 3383927245440. Its totient is φ = 243886602240.

The previous prime is 1020005000513. The next prime is 1020005000587. The reversal of 1020005000520 is 250005000201.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1020005000520.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5196319 + ... + 5389038.

It is an arithmetic number, because the mean of its divisors is an integer number (26436931605).

Almost surely, 2^{1020005000520} is an apocalyptic number.

1020005000520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020005000520 is an abundant number, since it is smaller than the sum of its proper divisors (2363922244920).

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

1020005000520 is a wasteful number, since it uses less digits than its factorization.

1020005000520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10585455 (or 10585451 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The spelling of 1020005000520 in words is "one trillion, twenty billion, five million, five hundred twenty", and thus it is an aban number.