20438055606399 has 8 divisors (see below), whose sum is σ = 27250917910320. Its totient is φ = 13625281853376.

The previous prime is 20438055606373. The next prime is 20438055606433. The reversal of 20438055606399 is 99360655083402.

It is a happy number.

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

It is not a de Polignac number, because 20438055606399 - 2²⁷ = 20437921388671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20438055606499) 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, 21597292 + ... + 22523745.

It is an arithmetic number, because the mean of its divisors is an integer number (3406364738790).

Almost surely, 2^{20438055606399} is an apocalyptic number.

20438055606399 is a deficient number, since it is larger than the sum of its proper divisors (6812862303921).

20438055606399 is a wasteful number, since it uses less digits than its factorization.

20438055606399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44275449.

The product of its (nonzero) digits is 41990400, while the sum is 60.

The spelling of 20438055606399 in words is "twenty trillion, four hundred thirty-eight billion, fifty-five million, six hundred six thousand, three hundred ninety-nine".