21033423124 has 12 divisors (see below), whose sum is σ = 42066846304. Its totient is φ = 9014324184.

The previous prime is 21033423119. The next prime is 21033423181. The reversal of 21033423124 is 42132433012.

21033423124 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375596814 + ... + 375596869.

Almost surely, 2^21033423124 is an apocalyptic number.

It is an amenable number.

21033423124 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21033423124 is a wasteful number, since it uses less digits than its factorization.

21033423124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751193694 (or 751193692 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21033423124 its reverse (42132433012), we get a palindrome (63165856136).

The spelling of 21033423124 in words is "twenty-one billion, thirty-three million, four hundred twenty-three thousand, one hundred twenty-four".