2011491930 has 64 divisors (see below), whose sum is σ = 5568860160. Its totient is φ = 455467584.

The previous prime is 2011491793. The next prime is 2011491941. The reversal of 2011491930 is 391941102.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22290 + ... + 67229.

It is an arithmetic number, because the mean of its divisors is an integer number (87013440).

Almost surely, 2^2011491930 is an apocalyptic number.

2011491930 is an abundant number, since it is smaller than the sum of its proper divisors (3557368230).

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

2011491930 is a wasteful number, since it uses less digits than its factorization.

2011491930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89643.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 2011491930 is about 44849.6591960296. The cubic root of 2011491930 is about 1262.3295967117.

The spelling of 2011491930 in words is "two billion, eleven million, four hundred ninety-one thousand, nine hundred thirty".