21602842 has 8 divisors (see below), whose sum is σ = 33813216. Its totient is φ = 10331772.

The previous prime is 21602839. The next prime is 21602849. The reversal of 21602842 is 24820612.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (21602849) 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, 234768 + ... + 234859.

It is an arithmetic number, because the mean of its divisors is an integer number (4226652).

Almost surely, 2^21602842 is an apocalyptic number.

21602842 is a deficient number, since it is larger than the sum of its proper divisors (12210374).

21602842 is a wasteful number, since it uses less digits than its factorization.

21602842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469652.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 21602842 is about 4647.8857559110. The cubic root of 21602842 is about 278.5075437362.

The spelling of 21602842 in words is "twenty-one million, six hundred two thousand, eight hundred forty-two".