20321111412 has 48 divisors (see below), whose sum is σ = 60210702720. Its totient is φ = 5806031616.

The previous prime is 20321111407. The next prime is 20321111417. The reversal of 20321111412 is 21411112302.

It is an interprime number because it is at equal distance from previous prime (20321111407) and next prime (20321111417).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321111417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13439133 + ... + 13440644.

It is an arithmetic number, because the mean of its divisors is an integer number (1254389640).

Almost surely, 2^20321111412 is an apocalyptic number.

It is an amenable number.

20321111412 is an abundant number, since it is smaller than the sum of its proper divisors (39889591308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20321111412 is a wasteful number, since it uses less digits than its factorization.

20321111412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26879797 (or 26879789 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 20321111412 its reverse (21411112302), we get a palindrome (41732223714).

The spelling of 20321111412 in words is "twenty billion, three hundred twenty-one million, one hundred eleven thousand, four hundred twelve".