21343032 has 48 divisors (see below), whose sum is σ = 58083480. Its totient is φ = 7080000.

The previous prime is 21343019. The next prime is 21343039. The reversal of 21343032 is 23034312.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21342996 and 21343014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21343039) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17482 + ... + 18662.

Almost surely, 2^21343032 is an apocalyptic number.

It is an amenable number.

21343032 is an abundant number, since it is smaller than the sum of its proper divisors (36740448).

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

21343032 is a wasteful number, since it uses less digits than its factorization.

21343032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444 (or 1437 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 21343032 is about 4619.8519456796. The cubic root of 21343032 is about 277.3865326219.

Adding to 21343032 its reverse (23034312), we get a palindrome (44377344).

The spelling of 21343032 in words is "twenty-one million, three hundred forty-three thousand, thirty-two".