20310312552 has 32 divisors (see below), whose sum is σ = 50790365280. Its totient is φ = 6768159680.

The previous prime is 20310312511. The next prime is 20310312577. The reversal of 20310312552 is 25521301302.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 34974 + ... + 204557.

It is an arithmetic number, because the mean of its divisors is an integer number (1587198915).

Almost surely, 2^20310312552 is an apocalyptic number.

It is an amenable number.

20310312552 is an abundant number, since it is smaller than the sum of its proper divisors (30480052728).

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

20310312552 is a wasteful number, since it uses less digits than its factorization.

20310312552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243073 (or 243069 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

Adding to 20310312552 its reverse (25521301302), we get a palindrome (45831613854).

The spelling of 20310312552 in words is "twenty billion, three hundred ten million, three hundred twelve thousand, five hundred fifty-two".