4420372021 has 16 divisors (see below), whose sum is σ = 5013547840. Its totient is φ = 3863583360.

The previous prime is 4420372013. The next prime is 4420372027. The reversal of 4420372021 is 1202730244.

It is a happy number.

It is not a de Polignac number, because 4420372021 - 2³ = 4420372013 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 (4420372027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 671281 + ... + 677833.

It is an arithmetic number, because the mean of its divisors is an integer number (313346740).

Almost surely, 2^4420372021 is an apocalyptic number.

It is an amenable number.

4420372021 is a deficient number, since it is larger than the sum of its proper divisors (593175819).

4420372021 is a wasteful number, since it uses less digits than its factorization.

4420372021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9316.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 4420372021 is about 66485.8783577385. The cubic root of 4420372021 is about 1641.1676224178.

The spelling of 4420372021 in words is "four billion, four hundred twenty million, three hundred seventy-two thousand, twenty-one".