21250445232652 has 48 divisors (see below), whose sum is σ = 39629527560000. Its totient is φ = 9935918936064.

The previous prime is 21250445232617. The next prime is 21250445232659. The reversal of 21250445232652 is 25623254405212.

It is a super-2 number, since 2×21250445232652² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21250445232599 and 21250445232608.

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 15 ways as a sum of consecutive naturals, for example, 8486724 + ... + 10701652.

It is an arithmetic number, because the mean of its divisors is an integer number (825615157500).

Almost surely, 2^{21250445232652} is an apocalyptic number.

It is an amenable number.

21250445232652 is a deficient number, since it is larger than the sum of its proper divisors (18379082327348).

21250445232652 is a wasteful number, since it uses less digits than its factorization.

21250445232652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2215858 (or 2215856 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 43.

Adding to 21250445232652 its reverse (25623254405212), we get a palindrome (46873699637864).

The spelling of 21250445232652 in words is "twenty-one trillion, two hundred fifty billion, four hundred forty-five million, two hundred thirty-two thousand, six hundred fifty-two".