21252562324430 has 16 divisors (see below), whose sum is σ = 38254758239520. Its totient is φ = 8500992472992.

The previous prime is 21252562324421. The next prime is 21252562324457. The reversal of 21252562324430 is 3442326525212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1211945 + ... + 6631284.

It is an arithmetic number, because the mean of its divisors is an integer number (2390922389970).

Almost surely, 2^{21252562324430} is an apocalyptic number.

21252562324430 is a deficient number, since it is larger than the sum of its proper divisors (17002195915090).

21252562324430 is a wasteful number, since it uses less digits than its factorization.

21252562324430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8114203.

The product of its (nonzero) digits is 691200, while the sum is 41.

Adding to 21252562324430 its reverse (3442326525212), we get a palindrome (24694888849642).

The spelling of 21252562324430 in words is "twenty-one trillion, two hundred fifty-two billion, five hundred sixty-two million, three hundred twenty-four thousand, four hundred thirty".