21942662 has 8 divisors (see below), whose sum is σ = 37616016. Its totient is φ = 9403992.

The previous prime is 21942659. The next prime is 21942673. The reversal of 21942662 is 26624912.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 783653 + ... + 783680.

It is an arithmetic number, because the mean of its divisors is an integer number (4702002).

Almost surely, 2^21942662 is an apocalyptic number.

21942662 is a deficient number, since it is larger than the sum of its proper divisors (15673354).

21942662 is a wasteful number, since it uses less digits than its factorization.

21942662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1567342.

The product of its digits is 10368, while the sum is 32.

The square root of 21942662 is about 4684.2995207395. The cubic root of 21942662 is about 279.9602919881.

The spelling of 21942662 in words is "twenty-one million, nine hundred forty-two thousand, six hundred sixty-two".