20200012120 has 128 divisors (see below), whose sum is σ = 46970461440. Its totient is φ = 7815846400.

The previous prime is 20200012117. The next prime is 20200012139. The reversal of 20200012120 is 2121000202.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20200012097 and 20200012106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35878959 + ... + 35879521.

It is an arithmetic number, because the mean of its divisors is an integer number (366956730).

Almost surely, 2^20200012120 is an apocalyptic number.

20200012120 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 20200012120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23485230720).

20200012120 is an abundant number, since it is smaller than the sum of its proper divisors (26770449320).

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

20200012120 is a wasteful number, since it uses less digits than its factorization.

20200012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865 (or 861 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20200012120 its reverse (2121000202), we get a palindrome (22321012322).

The spelling of 20200012120 in words is "twenty billion, two hundred million, twelve thousand, one hundred twenty".