21132662 has 8 divisors (see below), whose sum is σ = 31762800. Its totient is φ = 10545064.

The previous prime is 21132659. The next prime is 21132667. The reversal of 21132662 is 26623112.

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 (21132667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9362 + ... + 11397.

It is an arithmetic number, because the mean of its divisors is an integer number (3970350).

Almost surely, 2^21132662 is an apocalyptic number.

21132662 is a deficient number, since it is larger than the sum of its proper divisors (10630138).

21132662 is a wasteful number, since it uses less digits than its factorization.

21132662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21270.

The product of its digits is 864, while the sum is 23.

The square root of 21132662 is about 4597.0275178641. The cubic root of 21132662 is about 276.4721579243.

Adding to 21132662 its reverse (26623112), we get a palindrome (47755774).

The spelling of 21132662 in words is "twenty-one million, one hundred thirty-two thousand, six hundred sixty-two".