1900018385406 has 24 divisors (see below), whose sum is σ = 4154474455560. Its totient is φ = 627529007376.

The previous prime is 1900018385357. The next prime is 1900018385417. The reversal of 1900018385406 is 6045838100091.

1900018385406 is a `hidden beast` number, since 1 + 90 + 0 + 0 + 1 + 83 + 85 + 406 = 666.

It is a super-2 number, since 2×1900018385406² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 484202520 + ... + 484206443.

It is an arithmetic number, because the mean of its divisors is an integer number (173103102315).

Almost surely, 2^{1900018385406} is an apocalyptic number.

1900018385406 is an abundant number, since it is smaller than the sum of its proper divisors (2254456070154).

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

1900018385406 is a wasteful number, since it uses less digits than its factorization.

1900018385406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968409080 (or 968409077 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 1900018385406 in words is "one trillion, nine hundred billion, eighteen million, three hundred eighty-five thousand, four hundred six".