51504350020 has 48 divisors (see below), whose sum is σ = 111696360048. Its totient is φ = 19934138880.

The previous prime is 51504349991. The next prime is 51504350039. The reversal of 51504350020 is 2005340515.

It can be written as a sum of positive squares in 8 ways, for example, as 609892416 + 50894457604 = 24696^2 + 225598^2 .

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 15 ways as a sum of consecutive naturals, for example, 58327 + ... + 326206.

It is an arithmetic number, because the mean of its divisors is an integer number (2327007501).

Almost surely, 2^51504350020 is an apocalyptic number.

It is an amenable number.

51504350020 is an abundant number, since it is smaller than the sum of its proper divisors (60192010028).

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

51504350020 is a wasteful number, since it uses less digits than its factorization.

51504350020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384760 (or 384758 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

Adding to 51504350020 its reverse (2005340515), we get a palindrome (53509690535).

The spelling of 51504350020 in words is "fifty-one billion, five hundred four million, three hundred fifty thousand, twenty".