20013653450438 has 8 divisors (see below), whose sum is σ = 31600505448120. Its totient is φ = 9480151634400.

The previous prime is 20013653450423. The next prime is 20013653450447. The reversal of 20013653450438 is 83405435631002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263337545363 + ... + 263337545438.

It is an arithmetic number, because the mean of its divisors is an integer number (3950063181015).

Almost surely, 2^{20013653450438} is an apocalyptic number.

20013653450438 is a deficient number, since it is larger than the sum of its proper divisors (11586851997682).

20013653450438 is a wasteful number, since it uses less digits than its factorization.

20013653450438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526675090822.

The product of its (nonzero) digits is 1036800, while the sum is 44.

The spelling of 20013653450438 in words is "twenty trillion, thirteen billion, six hundred fifty-three million, four hundred fifty thousand, four hundred thirty-eight".