21338662 has 8 divisors (see below), whose sum is σ = 32041296. Its totient is φ = 10658232.

The previous prime is 21338651. The next prime is 21338671. The reversal of 21338662 is 26683312.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2893 + ... + 7144.

It is an arithmetic number, because the mean of its divisors is an integer number (4005162).

Almost surely, 2^21338662 is an apocalyptic number.

21338662 is a deficient number, since it is larger than the sum of its proper divisors (10702634).

21338662 is a wasteful number, since it uses less digits than its factorization.

21338662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11102.

The product of its digits is 10368, while the sum is 31.

The square root of 21338662 is about 4619.3789625879. The cubic root of 21338662 is about 277.3675996373.

The spelling of 21338662 in words is "twenty-one million, three hundred thirty-eight thousand, six hundred sixty-two".