201000020 has 48 divisors (see below), whose sum is σ = 462309120. Its totient is φ = 72951936.

The previous prime is 200999983. The next prime is 201000049. The reversal of 201000020 is 20000102.

201000020 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a junction number, because it is equal to n+sod(n) for n = 200999968 and 201000013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8789 + ... + 21891.

It is an arithmetic number, because the mean of its divisors is an integer number (9631440).

Almost surely, 2^201000020 is an apocalyptic number.

201000020 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 201000020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231154560).

201000020 is an abundant number, since it is smaller than the sum of its proper divisors (261309100).

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

201000020 is a wasteful number, since it uses less digits than its factorization.

201000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13184 (or 13182 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 5.

The square root of 201000020 is about 14177.4475841034. The cubic root of 201000020 is about 585.7766196938.

Adding to 201000020 its reverse (20000102), we get a palindrome (221000122).

The spelling of 201000020 in words is "two hundred one million, twenty", and thus it is an aban number.