21450050532 has 48 divisors (see below), whose sum is σ = 58538155200. Its totient is φ = 6773699520.

The previous prime is 21450050471. The next prime is 21450050537. The reversal of 21450050532 is 23505005412.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21450050496 and 21450050505.

It is not an unprimeable number, because it can be changed into a prime (21450050537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5224569 + ... + 5228672.

It is an arithmetic number, because the mean of its divisors is an integer number (1219544900).

Almost surely, 2^21450050532 is an apocalyptic number.

It is an amenable number.

21450050532 is an abundant number, since it is smaller than the sum of its proper divisors (37088104668).

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

21450050532 is a wasteful number, since it uses less digits than its factorization.

21450050532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10453273 (or 10453265 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

Adding to 21450050532 its reverse (23505005412), we get a palindrome (44955055944).

The spelling of 21450050532 in words is "twenty-one billion, four hundred fifty million, fifty thousand, five hundred thirty-two".