20408910379128 has 24 divisors (see below), whose sum is σ = 55274132277000. Its totient is φ = 6802970126352.

The previous prime is 20408910379073. The next prime is 20408910379129. The reversal of 20408910379128 is 82197301980402.

20408910379128 is a `hidden beast` number, since 2 + 0 + 408 + 9 + 103 + 7 + 9 + 128 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20408910379129) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 141728544228 + ... + 141728544371.

It is an arithmetic number, because the mean of its divisors is an integer number (2303088844875).

Almost surely, 2^{20408910379128} is an apocalyptic number.

It is an amenable number.

20408910379128 is an abundant number, since it is smaller than the sum of its proper divisors (34865221897872).

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

20408910379128 is a wasteful number, since it uses less digits than its factorization.

20408910379128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283457088611 (or 283457088604 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 20408910379128 in words is "twenty trillion, four hundred eight billion, nine hundred ten million, three hundred seventy-nine thousand, one hundred twenty-eight".