21234488 has 32 divisors (see below), whose sum is σ = 43666560. Its totient is φ = 9600480.

The previous prime is 21234487. The next prime is 21234509. The reversal of 21234488 is 88443212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21234487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19445 + ... + 20507.

It is an arithmetic number, because the mean of its divisors is an integer number (1364580).

Almost surely, 2^21234488 is an apocalyptic number.

It is an amenable number.

21234488 is an abundant number, since it is smaller than the sum of its proper divisors (22432072).

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

21234488 is a wasteful number, since it uses less digits than its factorization.

21234488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1307 (or 1303 counting only the distinct ones).

The product of its digits is 12288, while the sum is 32.

The square root of 21234488 is about 4608.0894088548. The cubic root of 21234488 is about 276.9154994286.

The spelling of 21234488 in words is "twenty-one million, two hundred thirty-four thousand, four hundred eighty-eight".