20120123072 has 56 divisors (see below), whose sum is σ = 45656601600. Its totient is φ = 8617800960.

The previous prime is 20120123071. The next prime is 20120123113. The reversal of 20120123072 is 27032102102.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (20120123071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 798929 + ... + 823727.

Almost surely, 2^20120123072 is an apocalyptic number.

It is an amenable number.

20120123072 is an abundant number, since it is smaller than the sum of its proper divisors (25536478528).

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

20120123072 is a wasteful number, since it uses less digits than its factorization.

20120123072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26629 (or 26619 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

Adding to 20120123072 its reverse (27032102102), we get a palindrome (47152225174).

The spelling of 20120123072 in words is "twenty billion, one hundred twenty million, one hundred twenty-three thousand, seventy-two".