20021232000000 has 1232 divisors, whose sum is σ = 83178780297984. Its totient is φ = 4159488000000.

The previous prime is 20021231999849. The next prime is 20021232000017. The reversal of 20021232000000 is 23212002.

It is a tau number, because it is divible by the number of its divisors (1232).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 20021232000000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 3695997292 + ... + 3696002708.

Almost surely, 2^{20021232000000} is an apocalyptic number.

20021232000000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20021232000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41589390148992).

20021232000000 is an abundant number, since it is smaller than the sum of its proper divisors (63157548297984).

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

20021232000000 is an frugal number, since it uses more digits than its factorization.

20021232000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5488 (or 5445 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 20021232000000 its reverse (23212002), we get a palindrome (20021255212002).

The spelling of 20021232000000 in words is "twenty trillion, twenty-one billion, two hundred thirty-two million", and thus it is an aban number.