21033124433 has 8 divisors (see below), whose sum is σ = 21958613568. Its totient is φ = 20108552464.

The previous prime is 21033124429. The next prime is 21033124439. The reversal of 21033124433 is 33442133012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21033124433 - 2² = 21033124429 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21033124439) 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, 182210 + ... + 274347.

It is an arithmetic number, because the mean of its divisors is an integer number (2744826696).

Almost surely, 2^21033124433 is an apocalyptic number.

21033124433 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21033124433 is a deficient number, since it is larger than the sum of its proper divisors (925489135).

21033124433 is a wasteful number, since it uses less digits than its factorization.

21033124433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458583.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 21033124433 its reverse (33442133012), we get a palindrome (54475257445).

The spelling of 21033124433 in words is "twenty-one billion, thirty-three million, one hundred twenty-four thousand, four hundred thirty-three".