20423550340400 has 60 divisors (see below), whose sum is σ = 49074906376992. Its totient is φ = 8168200293120.

The previous prime is 20423550340379. The next prime is 20423550340447. The reversal of 20423550340400 is 404305532402.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1127459 + ... + 6489858.

Almost surely, 2^{20423550340400} is an apocalyptic number.

20423550340400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20423550340400 is an abundant number, since it is smaller than the sum of its proper divisors (28651356036592).

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

20423550340400 is a wasteful number, since it uses less digits than its factorization.

20423550340400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7624038 (or 7624027 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 32.

Adding to 20423550340400 its reverse (404305532402), we get a palindrome (20827855872802).

The spelling of 20423550340400 in words is "twenty trillion, four hundred twenty-three billion, five hundred fifty million, three hundred forty thousand, four hundred".