21040243050 has 48 divisors (see below), whose sum is σ = 52382932992. Its totient is φ = 5588889600.

The previous prime is 21040243039. The next prime is 21040243061. The reversal of 21040243050 is 5034204012.

It is an interprime number because it is at equal distance from previous prime (21040243039) and next prime (21040243061).

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, 234346 + ... + 311445.

It is an arithmetic number, because the mean of its divisors is an integer number (1091311104).

Almost surely, 2^21040243050 is an apocalyptic number.

21040243050 is an abundant number, since it is smaller than the sum of its proper divisors (31342689942).

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

21040243050 is a wasteful number, since it uses less digits than its factorization.

21040243050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546063 (or 546058 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

Adding to 21040243050 its reverse (5034204012), we get a palindrome (26074447062).

The spelling of 21040243050 in words is "twenty-one billion, forty million, two hundred forty-three thousand, fifty".