4019046821 has 4 divisors (see below), whose sum is σ = 4020934944. Its totient is φ = 4017158700.

The previous prime is 4019046761. The next prime is 4019046847. The reversal of 4019046821 is 1286409104.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4019046821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4019046221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 940865 + ... + 945126.

It is an arithmetic number, because the mean of its divisors is an integer number (1005233736).

Almost surely, 2^4019046821 is an apocalyptic number.

It is an amenable number.

4019046821 is a deficient number, since it is larger than the sum of its proper divisors (1888123).

4019046821 is a wasteful number, since it uses less digits than its factorization.

4019046821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1888122.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 4019046821 is about 63395.9527178195. The cubic root of 4019046821 is about 1589.9166419915.

The spelling of 4019046821 in words is "four billion, nineteen million, forty-six thousand, eight hundred twenty-one".