2154005994 has 48 divisors (see below), whose sum is σ = 5047509600. Its totient is φ = 610991136.

The previous prime is 2154005989. The next prime is 2154006011. The reversal of 2154005994 is 4995004512.

2154005994 is a modest number, since divided by 5994 gives 2154 as remainder.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14512 + ... + 67220.

It is an arithmetic number, because the mean of its divisors is an integer number (105156450).

Almost surely, 2^2154005994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2154005994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2523754800).

2154005994 is an abundant number, since it is smaller than the sum of its proper divisors (2893503606).

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

2154005994 is a wasteful number, since it uses less digits than its factorization.

2154005994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52867 (or 52860 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 2154005994 is about 46411.2701183667. The cubic root of 2154005994 is about 1291.4639938258.

The spelling of 2154005994 in words is "two billion, one hundred fifty-four million, five thousand, nine hundred ninety-four".