20321111392 has 12 divisors (see below), whose sum is σ = 40007188116. Its totient is φ = 10160555680.

The previous prime is 20321111341. The next prime is 20321111407. The reversal of 20321111392 is 29311112302.

It is a super-3 number, since 3×20321111392³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317517334 + ... + 317517397.

It is an arithmetic number, because the mean of its divisors is an integer number (3333932343).

Almost surely, 2^20321111392 is an apocalyptic number.

It is an amenable number.

20321111392 is a deficient number, since it is larger than the sum of its proper divisors (19686076724).

20321111392 is an equidigital number, since it uses as much as digits as its factorization.

20321111392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635034741 (or 635034733 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

Adding to 20321111392 its reverse (29311112302), we get a palindrome (49632223694).

The spelling of 20321111392 in words is "twenty billion, three hundred twenty-one million, one hundred eleven thousand, three hundred ninety-two".