20013123656152 has 32 divisors (see below), whose sum is σ = 41105793445200. Its totient is φ = 9059128012800.

The previous prime is 20013123656087. The next prime is 20013123656159. The reversal of 20013123656152 is 25165632131002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013123656159) 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, 471808377 + ... + 471850792.

Almost surely, 2^{20013123656152} is an apocalyptic number.

20013123656152 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20013123656152 is an abundant number, since it is smaller than the sum of its proper divisors (21092669789048).

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

20013123656152 is a wasteful number, since it uses less digits than its factorization.

20013123656152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943659427 (or 943659423 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 37.

Adding to 20013123656152 its reverse (25165632131002), we get a palindrome (45178755787154).

The spelling of 20013123656152 in words is "twenty trillion, thirteen billion, one hundred twenty-three million, six hundred fifty-six thousand, one hundred fifty-two".