20438055606400 has 96 divisors (see below), whose sum is σ = 50770443675600. Its totient is φ = 8129550382080.

The previous prime is 20438055606373. The next prime is 20438055606433. The reversal of 20438055606400 is 460655083402.

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, 17267682 + ... + 18413281.

Almost surely, 2^{20438055606400} is an apocalyptic number.

20438055606400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20438055606400 is an abundant number, since it is smaller than the sum of its proper divisors (30332388069200).

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

20438055606400 is a wasteful number, since it uses less digits than its factorization.

20438055606400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35681166 (or 35681149 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 20438055606400 in words is "twenty trillion, four hundred thirty-eight billion, fifty-five million, six hundred six thousand, four hundred".