21343433252 has 12 divisors (see below), whose sum is σ = 37507290240. Its totient is φ = 10627064616.

The previous prime is 21343433227. The next prime is 21343433281. The reversal of 21343433252 is 25233434312.

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, 11161928 + ... + 11163839.

It is an arithmetic number, because the mean of its divisors is an integer number (3125607520).

Almost surely, 2^21343433252 is an apocalyptic number.

It is an amenable number.

21343433252 is a deficient number, since it is larger than the sum of its proper divisors (16163856988).

21343433252 is a wasteful number, since it uses less digits than its factorization.

21343433252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22326010 (or 22326008 counting only the distinct ones).

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

Adding to 21343433252 its reverse (25233434312), we get a palindrome (46576867564).

The spelling of 21343433252 in words is "twenty-one billion, three hundred forty-three million, four hundred thirty-three thousand, two hundred fifty-two".