2240000021 has 8 divisors (see below), whose sum is σ = 2574799104. Its totient is φ = 1908900720.

The previous prime is 2239999999. The next prime is 2240000069. The reversal of 2240000021 is 1200000422.

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

It is a cyclic number.

It is not a de Polignac number, because 2240000021 - 2¹⁰ = 2239998997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2239999957 and 2240000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2240000621) 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, 923645 + ... + 926066.

It is an arithmetic number, because the mean of its divisors is an integer number (321849888).

Almost surely, 2^2240000021 is an apocalyptic number.

It is an amenable number.

2240000021 is a deficient number, since it is larger than the sum of its proper divisors (334799083).

2240000021 is a wasteful number, since it uses less digits than its factorization.

2240000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849891.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 2240000021 is about 47328.6384866499. The cubic root of 2240000021 is about 1308.4265281643.

Adding to 2240000021 its reverse (1200000422), we get a palindrome (3440000443).

The spelling of 2240000021 in words is "two billion, two hundred forty million, twenty-one", and thus it is an aban number.