515403442020 has 96 divisors (see below), whose sum is σ = 1460392053120. Its totient is φ = 135805895680.

The previous prime is 515403441961. The next prime is 515403442033. The reversal of 515403442020 is 20244304515.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1690666 + ... + 1972094.

It is an arithmetic number, because the mean of its divisors is an integer number (15212417220).

Almost surely, 2^515403442020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 515403442020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (730196026560).

515403442020 is an abundant number, since it is smaller than the sum of its proper divisors (944988611100).

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

515403442020 is a wasteful number, since it uses less digits than its factorization.

515403442020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281805 (or 281803 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 515403442020 its reverse (20244304515), we get a palindrome (535647746535).

The spelling of 515403442020 in words is "five hundred fifteen billion, four hundred three million, four hundred forty-two thousand, twenty".