20120438337408 has 128 divisors (see below), whose sum is σ = 59404023453600. Its totient is φ = 6704465264640.

The previous prime is 20120438337407. The next prime is 20120438337437. The reversal of 20120438337408 is 80473383402102.

20120438337408 is a `hidden beast` number, since 2 + 0 + 1 + 204 + 3 + 8 + 3 + 37 + 408 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120438337407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8870160 + ... + 10905072.

Almost surely, 2^{20120438337408} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20120438337408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29702011726800).

20120438337408 is an abundant number, since it is smaller than the sum of its proper divisors (39283585116192).

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

20120438337408 is a wasteful number, since it uses less digits than its factorization.

20120438337408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2037797 (or 2037779 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The spelling of 20120438337408 in words is "twenty trillion, one hundred twenty billion, four hundred thirty-eight million, three hundred thirty-seven thousand, four hundred eight".