21250445232650 has 24 divisors (see below), whose sum is σ = 39529572445440. Its totient is φ = 8499372864560.

The previous prime is 21250445232617. The next prime is 21250445232659. The reversal of 21250445232650 is 5623254405212.

It is a super-2 number, since 2×21250445232650² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21250445232598 and 21250445232607.

It is not an unprimeable number, because it can be changed into a prime (21250445232659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19597484 + ... + 20653383.

It is an arithmetic number, because the mean of its divisors is an integer number (1647065518560).

Almost surely, 2^{21250445232650} is an apocalyptic number.

21250445232650 is a deficient number, since it is larger than the sum of its proper divisors (18279127212790).

21250445232650 is a wasteful number, since it uses less digits than its factorization.

21250445232650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40261438 (or 40261433 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 41.

Adding to 21250445232650 its reverse (5623254405212), we get a palindrome (26873699637862).

The spelling of 21250445232650 in words is "twenty-one trillion, two hundred fifty billion, four hundred forty-five million, two hundred thirty-two thousand, six hundred fifty".