20311310321330 has 24 divisors (see below), whose sum is σ = 42529396714668. Its totient is φ = 6963877824288.

The previous prime is 20311310321317. The next prime is 20311310321381. The reversal of 20311310321330 is 3312301311302.

It can be written as a sum of positive squares in 2 ways, for example, as 19911219915601 + 400090405729 = 4462199^2 + 632527^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20311310321296 and 20311310321305.

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 11 ways as a sum of consecutive naturals, for example, 20725826369 + ... + 20725827348.

Almost surely, 2^{20311310321330} is an apocalyptic number.

20311310321330 is an abundant number, since it is smaller than the sum of its proper divisors (22218086393338).

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

20311310321330 is a wasteful number, since it uses less digits than its factorization.

20311310321330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41451653738 (or 41451653731 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 20311310321330 its reverse (3312301311302), we get a palindrome (23623611632632).

The spelling of 20311310321330 in words is "twenty trillion, three hundred eleven billion, three hundred ten million, three hundred twenty-one thousand, three hundred thirty".