21301132 has 24 divisors (see below), whose sum is σ = 37984464. Its totient is φ = 10450752.

The previous prime is 21301097. The next prime is 21301157. The reversal of 21301132 is 23110312.

It is a super-3 number, since 3×21301132³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67038 + ... + 67354.

It is an arithmetic number, because the mean of its divisors is an integer number (1582686).

Almost surely, 2^21301132 is an apocalyptic number.

It is an amenable number.

21301132 is a deficient number, since it is larger than the sum of its proper divisors (16683332).

21301132 is a wasteful number, since it uses less digits than its factorization.

21301132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585 (or 583 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 21301132 is about 4615.3149404997. The cubic root of 21301132 is about 277.2048947355.

Adding to 21301132 its reverse (23110312), we get a palindrome (44411444).

The spelling of 21301132 in words is "twenty-one million, three hundred one thousand, one hundred thirty-two".