20012302120 has 64 divisors (see below), whose sum is σ = 45688608000. Its totient is φ = 7887829248.

The previous prime is 20012302109. The next prime is 20012302129. The reversal of 20012302120 is 2120321002.

It is a super-2 number, since 2×20012302120² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20012302120.

It is not an unprimeable number, because it can be changed into a prime (20012302129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1646626 + ... + 1658734.

It is an arithmetic number, because the mean of its divisors is an integer number (713884500).

Almost surely, 2^20012302120 is an apocalyptic number.

20012302120 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 20012302120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22844304000).

20012302120 is an abundant number, since it is smaller than the sum of its proper divisors (25676305880).

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

20012302120 is a wasteful number, since it uses less digits than its factorization.

20012302120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12722 (or 12718 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20012302120 its reverse (2120321002), we get a palindrome (22132623122).

The spelling of 20012302120 in words is "twenty billion, twelve million, three hundred two thousand, one hundred twenty".