21250050532 has 24 divisors (see below), whose sum is σ = 37826157600. Its totient is φ = 10442655936.

The previous prime is 21250050529. The next prime is 21250050533. The reversal of 21250050532 is 23505005212.

It is a happy number.

It is a super-2 number, since 2×21250050532² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21250050497 and 21250050506.

It is not an unprimeable number, because it can be changed into a prime (21250050533) 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, 1697448 + ... + 1709920.

It is an arithmetic number, because the mean of its divisors is an integer number (1576089900).

Almost surely, 2^21250050532 is an apocalyptic number.

It is an amenable number.

21250050532 is a deficient number, since it is larger than the sum of its proper divisors (16576107068).

21250050532 is a wasteful number, since it uses less digits than its factorization.

21250050532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19755 (or 19753 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

Adding to 21250050532 its reverse (23505005212), we get a palindrome (44755055744).

The spelling of 21250050532 in words is "twenty-one billion, two hundred fifty million, fifty thousand, five hundred thirty-two".