2154900186 has 48 divisors (see below), whose sum is σ = 4880139264. Its totient is φ = 712623744.

The previous prime is 2154900119. The next prime is 2154900211. The reversal of 2154900186 is 6810094512.

It is a self number, because there is not a number n which added to its sum of digits gives 2154900186.

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, 44266 + ... + 79178.

It is an arithmetic number, because the mean of its divisors is an integer number (101669568).

Almost surely, 2^2154900186 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2154900186, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2440069632).

2154900186 is an abundant number, since it is smaller than the sum of its proper divisors (2725239078).

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

2154900186 is a wasteful number, since it uses less digits than its factorization.

2154900186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35057 (or 35045 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 2154900186 is about 46420.9024686078. The cubic root of 2154900186 is about 1291.6426774835.

Adding to 2154900186 its reverse (6810094512), we get a palindrome (8964994698).

The spelling of 2154900186 in words is "two billion, one hundred fifty-four million, nine hundred thousand, one hundred eighty-six".