21002240330 has 16 divisors (see below), whose sum is σ = 39793718880. Its totient is φ = 7958743632.

The previous prime is 21002240321. The next prime is 21002240339. The reversal of 21002240330 is 3304220012.

It is an interprime number because it is at equal distance from previous prime (21002240321) and next prime (21002240339).

It is a junction number, because it is equal to n+sod(n) for n = 21002240299 and 21002240308.

It is not an unprimeable number, because it can be changed into a prime (21002240339) 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, 55268864 + ... + 55269243.

It is an arithmetic number, because the mean of its divisors is an integer number (2487107430).

Almost surely, 2^21002240330 is an apocalyptic number.

21002240330 is a deficient number, since it is larger than the sum of its proper divisors (18791478550).

21002240330 is a wasteful number, since it uses less digits than its factorization.

21002240330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110538133.

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 21002240330 its reverse (3304220012), we get a palindrome (24306460342).

The spelling of 21002240330 in words is "twenty-one billion, two million, two hundred forty thousand, three hundred thirty".