2091912100 has 144 divisors (see below), whose sum is σ = 4974681600. Its totient is φ = 761080320.

The previous prime is 2091912091. The next prime is 2091912131. The reversal of 2091912100 is 12191902.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5269102 + ... + 5269498.

It is an arithmetic number, because the mean of its divisors is an integer number (34546400).

Almost surely, 2^2091912100 is an apocalyptic number.

2091912100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2091912100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2487340800).

2091912100 is an abundant number, since it is smaller than the sum of its proper divisors (2882769500).

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

2091912100 is a wasteful number, since it uses less digits than its factorization.

2091912100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542 (or 535 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 2091912100 is about 45737.4255943642. The cubic root of 2091912100 is about 1278.9330505027.

The spelling of 2091912100 in words is "two billion, ninety-one million, nine hundred twelve thousand, one hundred".