21230033633425 has 12 divisors (see below), whose sum is σ = 26363339037616. Its totient is φ = 16959447982800.

The previous prime is 21230033633423. The next prime is 21230033633429. The reversal of 21230033633425 is 52433633003212.

It is not a de Polignac number, because 21230033633425 - 2¹ = 21230033633423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21230033633423) 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, 614455479 + ... + 614490028.

Almost surely, 2^{21230033633425} is an apocalyptic number.

21230033633425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21230033633425 is a deficient number, since it is larger than the sum of its proper divisors (5133305404191).

21230033633425 is a wasteful number, since it uses less digits than its factorization.

21230033633425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228946208 (or 1228946203 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 37.

Adding to 21230033633425 its reverse (52433633003212), we get a palindrome (73663666636637).

The spelling of 21230033633425 in words is "twenty-one trillion, two hundred thirty billion, thirty-three million, six hundred thirty-three thousand, four hundred twenty-five".