201000220020 has 144 divisors (see below), whose sum is σ = 612423826560. Its totient is φ = 53361158400.

The previous prime is 201000220019. The next prime is 201000220021. The reversal of 201000220020 is 20022000102.

It is an interprime number because it is at equal distance from previous prime (201000220019) and next prime (201000220021).

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

It is a junction number, because it is equal to n+sod(n) for n = 201000219984 and 201000220011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201000220021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 49985610 + ... + 49989630.

It is an arithmetic number, because the mean of its divisors is an integer number (4252943240).

Almost surely, 2^201000220020 is an apocalyptic number.

201000220020 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 201000220020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306211913280).

201000220020 is an abundant number, since it is smaller than the sum of its proper divisors (411423606540).

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

201000220020 is a wasteful number, since it uses less digits than its factorization.

201000220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5206 (or 5201 counting only the distinct ones).

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

Adding to 201000220020 its reverse (20022000102), we get a palindrome (221022220122).

The spelling of 201000220020 in words is "two hundred one billion, two hundred twenty thousand, twenty".