2091814004 has 24 divisors (see below), whose sum is σ = 4187516928. Its totient is φ = 895658400.

The previous prime is 2091814003. The next prime is 2091814019. The reversal of 2091814004 is 4004181902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091814003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3572 + ... + 64779.

It is an arithmetic number, because the mean of its divisors is an integer number (174479872).

Almost surely, 2^2091814004 is an apocalyptic number.

It is an amenable number.

2091814004 is an abundant number, since it is smaller than the sum of its proper divisors (2095702924).

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

2091814004 is a wasteful number, since it uses less digits than its factorization.

2091814004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69455 (or 69453 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 2091814004 is about 45736.3531996157. The cubic root of 2091814004 is about 1278.9130591946.

Adding to 2091814004 its reverse (4004181902), we get a palindrome (6095995906).

The spelling of 2091814004 in words is "two billion, ninety-one million, eight hundred fourteen thousand, four".