20130123504 has 80 divisors (see below), whose sum is σ = 56550050208. Its totient is φ = 6144638976.

The previous prime is 20130123493. The next prime is 20130123523. The reversal of 20130123504 is 40532103102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 303177 + ... + 363560.

Almost surely, 2^20130123504 is an apocalyptic number.

20130123504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20130123504 is an abundant number, since it is smaller than the sum of its proper divisors (36419926704).

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

20130123504 is a wasteful number, since it uses less digits than its factorization.

20130123504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666802 (or 666796 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 20130123504 its reverse (40532103102), we get a palindrome (60662226606).

The spelling of 20130123504 in words is "twenty billion, one hundred thirty million, one hundred twenty-three thousand, five hundred four".