20201200020 has 72 divisors (see below), whose sum is σ = 61291915776. Its totient is φ = 5385673152.

The previous prime is 20201199973. The next prime is 20201200021. The reversal of 20201200020 is 2000210202.

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 = 20201199975 and 20201200011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201200021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 892969 + ... + 915311.

It is an arithmetic number, because the mean of its divisors is an integer number (851276608).

Almost surely, 2^20201200020 is an apocalyptic number.

20201200020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20201200020 is an abundant number, since it is smaller than the sum of its proper divisors (41090715756).

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

20201200020 is a wasteful number, since it uses less digits than its factorization.

20201200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27381 (or 27376 counting only the distinct ones).

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

Adding to 20201200020 its reverse (2000210202), we get a palindrome (22201410222).

The spelling of 20201200020 in words is "twenty billion, two hundred one million, two hundred thousand, twenty".