20642241 has 8 divisors (see below), whose sum is σ = 27544000. Its totient is φ = 13750992.

The previous prime is 20642239. The next prime is 20642257. The reversal of 20642241 is 14224602.

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

It is not a de Polignac number, because 20642241 - 2¹ = 20642239 is a prime.

It is a super-2 number, since 2×20642241² = 852204227004162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20642291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6135 + ... + 8883.

It is an arithmetic number, because the mean of its divisors is an integer number (3443000).

Almost surely, 2^20642241 is an apocalyptic number.

It is an amenable number.

20642241 is a deficient number, since it is larger than the sum of its proper divisors (6901759).

20642241 is a wasteful number, since it uses less digits than its factorization.

20642241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5255.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 20642241 is about 4543.3733062560. The cubic root of 20642241 is about 274.3167213288.

Adding to 20642241 its reverse (14224602), we get a palindrome (34866843).

The spelling of 20642241 in words is "twenty million, six hundred forty-two thousand, two hundred forty-one".