21652042 has 8 divisors (see below), whose sum is σ = 32793696. Its totient is φ = 10720812.

The previous prime is 21652003. The next prime is 21652061. The reversal of 21652042 is 24025612.

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

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, 52348 + ... + 52759.

It is an arithmetic number, because the mean of its divisors is an integer number (4099212).

Almost surely, 2^21652042 is an apocalyptic number.

21652042 is a deficient number, since it is larger than the sum of its proper divisors (11141654).

21652042 is a wasteful number, since it uses less digits than its factorization.

21652042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105212.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 21652042 is about 4653.1754748773. The cubic root of 21652042 is about 278.7188150411.

Adding to 21652042 its reverse (24025612), we get a palindrome (45677654).

The spelling of 21652042 in words is "twenty-one million, six hundred fifty-two thousand, forty-two".