8724003021 has 24 divisors (see below), whose sum is σ = 13073910304. Its totient is φ = 5813395920.

The previous prime is 8724003011. The next prime is 8724003049. The reversal of 8724003021 is 1203004278.

8724003021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8724003021 - 2¹⁰ = 8724001997 is a prime.

It is a super-2 number, since 2×8724003021² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8724003011) 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, 643806 + ... + 657216.

Almost surely, 2^8724003021 is an apocalyptic number.

8724003021 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

8724003021 is a deficient number, since it is larger than the sum of its proper divisors (4349907283).

8724003021 is a wasteful number, since it uses less digits than its factorization.

8724003021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16103 (or 16091 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 8724003021 is about 93402.3716026526. The cubic root of 8724003021 is about 2058.5998451209.

Adding to 8724003021 its reverse (1203004278), we get a palindrome (9927007299).

The spelling of 8724003021 in words is "eight billion, seven hundred twenty-four million, three thousand, twenty-one".