21413032 has 16 divisors (see below), whose sum is σ = 40716000. Its totient is φ = 10555440.

The previous prime is 21413027. The next prime is 21413039. The reversal of 21413032 is 23031412.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21412997 and 21413015.

It is not an unprimeable number, because it can be changed into a prime (21413039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18282 + ... + 19417.

It is an arithmetic number, because the mean of its divisors is an integer number (2544750).

Almost surely, 2^21413032 is an apocalyptic number.

It is an amenable number.

21413032 is a deficient number, since it is larger than the sum of its proper divisors (19302968).

21413032 is a wasteful number, since it uses less digits than its factorization.

21413032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37776 (or 37772 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 21413032 is about 4627.4217443410. The cubic root of 21413032 is about 277.6894553451.

Adding to 21413032 its reverse (23031412), we get a palindrome (44444444).

The spelling of 21413032 in words is "twenty-one million, four hundred thirteen thousand, thirty-two".