21033234542 has 8 divisors (see below), whose sum is σ = 31904344800. Its totient is φ = 10398452944.

The previous prime is 21033234539. The next prime is 21033234553. The reversal of 21033234542 is 24543233012.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59081942 + ... + 59082297.

It is an arithmetic number, because the mean of its divisors is an integer number (3988043100).

Almost surely, 2^21033234542 is an apocalyptic number.

21033234542 is a deficient number, since it is larger than the sum of its proper divisors (10871110258).

21033234542 is a wasteful number, since it uses less digits than its factorization.

21033234542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118164330.

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 21033234542 its reverse (24543233012), we get a palindrome (45576467554).

The spelling of 21033234542 in words is "twenty-one billion, thirty-three million, two hundred thirty-four thousand, five hundred forty-two".