4473720021 has 8 divisors (see below), whose sum is σ = 5967952000. Its totient is φ = 2980984032.

The previous prime is 4473720007. The next prime is 4473720029. The reversal of 4473720021 is 1200273744.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4473720021 - 2⁵ = 4473719989 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 (4473720029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367000 + ... + 378993.

It is an arithmetic number, because the mean of its divisors is an integer number (745994000).

Almost surely, 2^4473720021 is an apocalyptic number.

It is an amenable number.

4473720021 is a deficient number, since it is larger than the sum of its proper divisors (1494231979).

4473720021 is a wasteful number, since it uses less digits than its factorization.

4473720021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747995.

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 4473720021 is about 66885.8731048642. The cubic root of 4473720021 is about 1647.7434744472.

Adding to 4473720021 its reverse (1200273744), we get a palindrome (5673993765).

The spelling of 4473720021 in words is "four billion, four hundred seventy-three million, seven hundred twenty thousand, twenty-one".