2193004821 has 32 divisors (see below), whose sum is σ = 3463520256. Its totient is φ = 1207800000.

The previous prime is 2193004789. The next prime is 2193004831. The reversal of 2193004821 is 1284003912.

It is not a de Polignac number, because 2193004821 - 2⁵ = 2193004789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2193004831) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156691 + ... + 170111.

It is an arithmetic number, because the mean of its divisors is an integer number (108235008).

Almost surely, 2^2193004821 is an apocalyptic number.

2193004821 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2193004821 is a deficient number, since it is larger than the sum of its proper divisors (1270515435).

2193004821 is a wasteful number, since it uses less digits than its factorization.

2193004821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13713.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 2193004821 is about 46829.5293698324. The cubic root of 2193004821 is about 1299.2115181156.

Subtracting from 2193004821 its reverse (1284003912), we obtain a palindrome (909000909).

The spelling of 2193004821 in words is "two billion, one hundred ninety-three million, four thousand, eight hundred twenty-one".