20310300021 has 64 divisors (see below), whose sum is σ = 31956664320. Its totient is φ = 11342208960.

The previous prime is 20310300019. The next prime is 20310300071. The reversal of 20310300021 is 12000301302.

It is a happy number.

It is not a de Polignac number, because 20310300021 - 2¹ = 20310300019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20310300071) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 4919260 + ... + 4923386.

It is an arithmetic number, because the mean of its divisors is an integer number (499322880).

Almost surely, 2^20310300021 is an apocalyptic number.

It is an amenable number.

20310300021 is a deficient number, since it is larger than the sum of its proper divisors (11646364299).

20310300021 is a wasteful number, since it uses less digits than its factorization.

20310300021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4374.

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 20310300021 its reverse (12000301302), we get a palindrome (32310601323).

The spelling of 20310300021 in words is "twenty billion, three hundred ten million, three hundred thousand, twenty-one".