21672662 has 8 divisors (see below), whose sum is σ = 35464392. Its totient is φ = 9851200.

The previous prime is 21672649. The next prime is 21672719. The reversal of 21672662 is 26627612.

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 492539 + ... + 492582.

It is an arithmetic number, because the mean of its divisors is an integer number (4433049).

Almost surely, 2^21672662 is an apocalyptic number.

21672662 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21672662 is a deficient number, since it is larger than the sum of its proper divisors (13791730).

21672662 is a wasteful number, since it uses less digits than its factorization.

21672662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985134.

The product of its digits is 12096, while the sum is 32.

The square root of 21672662 is about 4655.3906388186. The cubic root of 21672662 is about 278.8072648744.

The spelling of 21672662 in words is "twenty-one million, six hundred seventy-two thousand, six hundred sixty-two".