20000221002000 has 160 divisors (see below), whose sum is σ = 71645236316160. Its totient is φ = 5333392252800.

The previous prime is 20000221001987. The next prime is 20000221002007. The reversal of 20000221002000 is 20012200002.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (20000221002007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 185133232 + ... + 185241231.

It is an arithmetic number, because the mean of its divisors is an integer number (447782726976).

Almost surely, 2^{20000221002000} is an apocalyptic number.

20000221002000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20000221002000 is an abundant number, since it is smaller than the sum of its proper divisors (51645015314160).

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

20000221002000 is a wasteful number, since it uses less digits than its factorization.

20000221002000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370374495 (or 370374473 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 20000221002000 its reverse (20012200002), we get a palindrome (20020233202002).

The spelling of 20000221002000 in words is "twenty trillion, two hundred twenty-one million, two thousand".