21434332 has 18 divisors (see below), whose sum is σ = 38081624. Its totient is φ = 10556280.

The previous prime is 21434327. The next prime is 21434341. The reversal of 21434332 is 23343412.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19633 + ... + 20695.

Almost surely, 2^21434332 is an apocalyptic number.

It is an amenable number.

21434332 is a deficient number, since it is larger than the sum of its proper divisors (16647292).

21434332 is a wasteful number, since it uses less digits than its factorization.

21434332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209 (or 1136 counting only the distinct ones).

The product of its digits is 1728, while the sum is 22.

The square root of 21434332 is about 4629.7226698799. The cubic root of 21434332 is about 277.7814993753.

Adding to 21434332 its reverse (23343412), we get a palindrome (44777744).

The spelling of 21434332 in words is "twenty-one million, four hundred thirty-four thousand, three hundred thirty-two".