21234333452 has 24 divisors (see below), whose sum is σ = 38366200320. Its totient is φ = 10276640640.

The previous prime is 21234333451. The next prime is 21234333541. The reversal of 21234333452 is 25433343212.

It is not an unprimeable number, because it can be changed into a prime (21234333451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 488927 + ... + 530582.

It is an arithmetic number, because the mean of its divisors is an integer number (1598591680).

Almost surely, 2^21234333452 is an apocalyptic number.

It is an amenable number.

21234333452 is a deficient number, since it is larger than the sum of its proper divisors (17131866868).

21234333452 is a wasteful number, since it uses less digits than its factorization.

21234333452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019681 (or 1019679 counting only the distinct ones).

The product of its digits is 51840, while the sum is 32.

Adding to 21234333452 its reverse (25433343212), we get a palindrome (46667676664).

The spelling of 21234333452 in words is "twenty-one billion, two hundred thirty-four million, three hundred thirty-three thousand, four hundred fifty-two".