2011897500 has 60 divisors (see below), whose sum is σ = 5866178472. Its totient is φ = 536504000.

The previous prime is 2011897499. The next prime is 2011897519. The reversal of 2011897500 is 57981102.

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 126627 + ... + 141626.

Almost surely, 2^2011897500 is an apocalyptic number.

2011897500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011897500 is an abundant number, since it is smaller than the sum of its proper divisors (3854280972).

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

2011897500 is a wasteful number, since it uses less digits than its factorization.

2011897500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268280 (or 268263 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 2011897500 is about 44854.1804071817. The cubic root of 2011897500 is about 1262.4144306936.

The spelling of 2011897500 in words is "two billion, eleven million, eight hundred ninety-seven thousand, five hundred".