20310021311 has 32 divisors (see below), whose sum is σ = 21576834048. Its totient is φ = 19096197120.

The previous prime is 20310021307. The next prime is 20310021323. The reversal of 20310021311 is 11312001302.

It is a cyclic number.

It is not a de Polignac number, because 20310021311 - 2² = 20310021307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20310021331) 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 31 ways as a sum of consecutive naturals, for example, 61359416 + ... + 61359746.

It is an arithmetic number, because the mean of its divisors is an integer number (674276064).

Almost surely, 2^20310021311 is an apocalyptic number.

20310021311 is a deficient number, since it is larger than the sum of its proper divisors (1266812737).

20310021311 is a wasteful number, since it uses less digits than its factorization.

20310021311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 20310021311 its reverse (11312001302), we get a palindrome (31622022613).

The spelling of 20310021311 in words is "twenty billion, three hundred ten million, twenty-one thousand, three hundred eleven".