21033242630 has 48 divisors (see below), whose sum is σ = 41694774624. Its totient is φ = 7623918720.

The previous prime is 21033242567. The next prime is 21033242689. The reversal of 21033242630 is 3624233012.

It is a self number, because there is not a number n which added to its sum of digits gives 21033242630.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43631 + ... + 209690.

It is an arithmetic number, because the mean of its divisors is an integer number (868641138).

Almost surely, 2^21033242630 is an apocalyptic number.

21033242630 is a deficient number, since it is larger than the sum of its proper divisors (20661531994).

21033242630 is a wasteful number, since it uses less digits than its factorization.

21033242630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253389 (or 253370 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 21033242630 its reverse (3624233012), we get a palindrome (24657475642).

The spelling of 21033242630 in words is "twenty-one billion, thirty-three million, two hundred forty-two thousand, six hundred thirty".