20405119788405 has 192 divisors, whose sum is σ = 40480508989440. Its totient is φ = 9411902438400.

The previous prime is 20405119788343. The next prime is 20405119788409. The reversal of 20405119788405 is 50488791150402.

20405119788405 is a `hidden beast` number, since 2 + 0 + 4 + 0 + 511 + 9 + 7 + 88 + 40 + 5 = 666.

It is not a de Polignac number, because 20405119788405 - 2¹¹ = 20405119786357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20405119788409) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 6358714441 + ... + 6358717649.

It is an arithmetic number, because the mean of its divisors is an integer number (210835984320).

Almost surely, 2^{20405119788405} is an apocalyptic number.

It is an amenable number.

20405119788405 is a deficient number, since it is larger than the sum of its proper divisors (20075389201035).

20405119788405 is a wasteful number, since it uses less digits than its factorization.

20405119788405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6112 (or 6109 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 54.

The spelling of 20405119788405 in words is "twenty trillion, four hundred five billion, one hundred nineteen million, seven hundred eighty-eight thousand, four hundred five".