20303131311 has 6 divisors (see below), whose sum is σ = 29326745240. Its totient is φ = 13535420868.

The previous prime is 20303131307. The next prime is 20303131339. The reversal of 20303131311 is 11313130302.

It is a happy number.

20303131311 is a `hidden beast` number, since 20 + 303 + 1 + 31 + 311 = 666.

It is not a de Polignac number, because 20303131311 - 2² = 20303131307 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 (20303131301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1127951731 + ... + 1127951748.

Almost surely, 2^20303131311 is an apocalyptic number.

20303131311 is a deficient number, since it is larger than the sum of its proper divisors (9023613929).

20303131311 is a wasteful number, since it uses less digits than its factorization.

20303131311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2255903485 (or 2255903482 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 20303131311 its reverse (11313130302), we get a palindrome (31616261613).

The spelling of 20303131311 in words is "twenty billion, three hundred three million, one hundred thirty-one thousand, three hundred eleven".