20021022001992 has 96 divisors (see below), whose sum is σ = 55036479960000. Its totient is φ = 6064766970240.

The previous prime is 20021022001973. The next prime is 20021022002027. The reversal of 20021022001992 is 29910022012002.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6729133 + ... + 9237059.

It is an arithmetic number, because the mean of its divisors is an integer number (573296666250).

Almost surely, 2^{20021022001992} is an apocalyptic number.

20021022001992 is a gapful number since it is divisible by the number (22) 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 20021022001992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27518239980000).

20021022001992 is an abundant number, since it is smaller than the sum of its proper divisors (35015457958008).

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

20021022001992 is a wasteful number, since it uses less digits than its factorization.

20021022001992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2510707 (or 2510692 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

Adding to 20021022001992 its reverse (29910022012002), we get a palindrome (49931044013994).

The spelling of 20021022001992 in words is "twenty trillion, twenty-one billion, twenty-two million, one thousand, nine hundred ninety-two".