21132302 has 8 divisors (see below), whose sum is σ = 32471712. Its totient is φ = 10308400.

The previous prime is 21132301. The next prime is 21132311. The reversal of 21132302 is 20323112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21132301) 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, 128774 + ... + 128937.

It is an arithmetic number, because the mean of its divisors is an integer number (4058964).

Almost surely, 2^21132302 is an apocalyptic number.

21132302 is a deficient number, since it is larger than the sum of its proper divisors (11339410).

21132302 is a wasteful number, since it uses less digits than its factorization.

21132302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257754.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 21132302 is about 4596.9883619605. The cubic root of 21132302 is about 276.4705879921.

Adding to 21132302 its reverse (20323112), we get a palindrome (41455414).

The spelling of 21132302 in words is "twenty-one million, one hundred thirty-two thousand, three hundred two".