20120123104 has 24 divisors (see below), whose sum is σ = 39614685768. Its totient is φ = 10059250560.

The previous prime is 20120123071. The next prime is 20120123113. The reversal of 20120123104 is 40132102102.

It is a super-2 number, since 2×20120123104² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 678639 + ... + 707665.

It is an arithmetic number, because the mean of its divisors is an integer number (1650611907).

Almost surely, 2^20120123104 is an apocalyptic number.

It is an amenable number.

20120123104 is a deficient number, since it is larger than the sum of its proper divisors (19494562664).

20120123104 is a wasteful number, since it uses less digits than its factorization.

20120123104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50698 (or 50690 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20120123104 its reverse (40132102102), we get a palindrome (60252225206).

The spelling of 20120123104 in words is "twenty billion, one hundred twenty million, one hundred twenty-three thousand, one hundred four".