4154444021 has 24 divisors (see below), whose sum is σ = 5206452480. Its totient is φ = 3245351616.

The previous prime is 4154444017. The next prime is 4154444057. The reversal of 4154444021 is 1204444514.

It is not a de Polignac number, because 4154444021 - 2² = 4154444017 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 (4154344021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71231 + ... + 115683.

It is an arithmetic number, because the mean of its divisors is an integer number (216935520).

Almost surely, 2^4154444021 is an apocalyptic number.

It is an amenable number.

4154444021 is a deficient number, since it is larger than the sum of its proper divisors (1052008459).

4154444021 is a wasteful number, since it uses less digits than its factorization.

4154444021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44565 (or 44552 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 29.

The square root of 4154444021 is about 64454.9766969161. The cubic root of 4154444021 is about 1607.5739886789.

Adding to 4154444021 its reverse (1204444514), we get a palindrome (5358888535).

The spelling of 4154444021 in words is "four billion, one hundred fifty-four million, four hundred forty-four thousand, twenty-one".