20123220030 has 128 divisors (see below), whose sum is σ = 52164034560. Its totient is φ = 4953674880.

The previous prime is 20123220001. The next prime is 20123220037. The reversal of 20123220030 is 3002232102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 20123219991 and 20123220009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123220037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9389139 + ... + 9391281.

It is an arithmetic number, because the mean of its divisors is an integer number (407531520).

Almost surely, 2^20123220030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20123220030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26082017280).

20123220030 is an abundant number, since it is smaller than the sum of its proper divisors (32040814530).

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

20123220030 is a wasteful number, since it uses less digits than its factorization.

20123220030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2646.

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 20123220030 its reverse (3002232102), we get a palindrome (23125452132).

The spelling of 20123220030 in words is "twenty billion, one hundred twenty-three million, two hundred twenty thousand, thirty".