21002240350 has 144 divisors (see below), whose sum is σ = 49173602688. Its totient is φ = 6614818560.

The previous prime is 21002240341. The next prime is 21002240353. The reversal of 21002240350 is 5304220012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002240353) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 7101072 + ... + 7104028.

It is an arithmetic number, because the mean of its divisors is an integer number (341483352).

Almost surely, 2^21002240350 is an apocalyptic number.

21002240350 is an abundant number, since it is smaller than the sum of its proper divisors (28171362338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21002240350 is a wasteful number, since it uses less digits than its factorization.

21002240350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3219 (or 3207 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

Adding to 21002240350 its reverse (5304220012), we get a palindrome (26306460362).

The spelling of 21002240350 in words is "twenty-one billion, two million, two hundred forty thousand, three hundred fifty".