2091139050 has 384 divisors, whose sum is σ = 7339530240. Its totient is φ = 379468800.

The previous prime is 2091139003. The next prime is 2091139067. The reversal of 2091139050 is 509311902.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2091138999 and 2091139017.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2852484 + ... + 2853216.

It is an arithmetic number, because the mean of its divisors is an integer number (19113360).

Almost surely, 2^2091139050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2091139050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3669765120).

2091139050 is an abundant number, since it is smaller than the sum of its proper divisors (5248391190).

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

2091139050 is a wasteful number, since it uses less digits than its factorization.

2091139050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798 (or 793 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 2091139050 is about 45728.9738568449. The cubic root of 2091139050 is about 1278.7754911409.

It can be divided in two parts, 2091 and 139050, that added together give a palindrome (141141).

The spelling of 2091139050 in words is "two billion, ninety-one million, one hundred thirty-nine thousand, fifty".