20031321311 has 8 divisors (see below), whose sum is σ = 21169612800. Its totient is φ = 18901431000.

The previous prime is 20031321281. The next prime is 20031321313. The reversal of 20031321311 is 11312313002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20031321311 - 2²² = 20027127007 is a prime.

It is a super-3 number, since 3×20031321311³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20031321311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031321313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2095391 + ... + 2104928.

It is an arithmetic number, because the mean of its divisors is an integer number (2646201600).

Almost surely, 2^20031321311 is an apocalyptic number.

20031321311 is a deficient number, since it is larger than the sum of its proper divisors (1138291489).

20031321311 is a wasteful number, since it uses less digits than its factorization.

20031321311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4200589.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 20031321311 its reverse (11312313002), we get a palindrome (31343634313).

The spelling of 20031321311 in words is "twenty billion, thirty-one million, three hundred twenty-one thousand, three hundred eleven".