21333434024 has 32 divisors (see below), whose sum is σ = 47290867200. Its totient is φ = 8827627200.

The previous prime is 21333433981. The next prime is 21333434027. The reversal of 21333434024 is 42043433312.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (21333434027) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6566552 + ... + 6569799.

It is an arithmetic number, because the mean of its divisors is an integer number (1477839600).

Almost surely, 2^21333434024 is an apocalyptic number.

It is an amenable number.

21333434024 is an abundant number, since it is smaller than the sum of its proper divisors (25957433176).

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

21333434024 is a wasteful number, since it uses less digits than its factorization.

21333434024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13136393 (or 13136389 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 21333434024 its reverse (42043433312), we get a palindrome (63376867336).

The spelling of 21333434024 in words is "twenty-one billion, three hundred thirty-three million, four hundred thirty-four thousand, twenty-four".