20123220024 has 24 divisors (see below), whose sum is σ = 54500387760. Its totient is φ = 6707739984.

The previous prime is 20123220001. The next prime is 20123220037. The reversal of 20123220024 is 42002232102.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20123219979 and 20123220006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 139744512 + ... + 139744655.

It is an arithmetic number, because the mean of its divisors is an integer number (2270849490).

Almost surely, 2^20123220024 is an apocalyptic number.

20123220024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20123220024 is an abundant number, since it is smaller than the sum of its proper divisors (34377167736).

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

20123220024 is a wasteful number, since it uses less digits than its factorization.

20123220024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279489179 (or 279489172 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 20123220024 its reverse (42002232102), we get a palindrome (62125452126).

The spelling of 20123220024 in words is "twenty billion, one hundred twenty-three million, two hundred twenty thousand, twenty-four".