2091786930 has 80 divisors (see below), whose sum is σ = 5955479640. Its totient is φ = 524994048.

The previous prime is 2091786887. The next prime is 2091786937. The reversal of 2091786930 is 396871902.

It can be written as a sum of positive squares in 4 ways, for example, as 2032296561 + 59490369 = 45081^2 + 7713^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2091786937) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 62185 + ... + 89724.

Almost surely, 2^2091786930 is an apocalyptic number.

2091786930 is an abundant number, since it is smaller than the sum of its proper divisors (3863692710).

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

2091786930 is a wasteful number, since it uses less digits than its factorization.

2091786930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151945 (or 151936 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 2091786930 is about 45736.0572196599. The cubic root of 2091786930 is about 1278.9075415846.

The spelling of 2091786930 in words is "two billion, ninety-one million, seven hundred eighty-six thousand, nine hundred thirty".