20313031321 has 8 divisors (see below), whose sum is σ = 22196549088. Its totient is φ = 18435660000.

The previous prime is 20313031301. The next prime is 20313031337. The reversal of 20313031321 is 12313031302.

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 20313031321 - 2²³ = 20304642713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20313031301) 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, 1529695 + ... + 1542916.

It is an arithmetic number, because the mean of its divisors is an integer number (2774568636).

Almost surely, 2^20313031321 is an apocalyptic number.

It is an amenable number.

20313031321 is a deficient number, since it is larger than the sum of its proper divisors (1883517767).

20313031321 is a wasteful number, since it uses less digits than its factorization.

20313031321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3073223.

The product of its (nonzero) digits is 324, while the sum is 19.

Subtracting from 20313031321 its sum of digits (19), we obtain a palindrome (20313031302).

Adding to 20313031321 its reverse (12313031302), we get a palindrome (32626062623).

The spelling of 20313031321 in words is "twenty billion, three hundred thirteen million, thirty-one thousand, three hundred twenty-one".