20450642 has 8 divisors (see below), whose sum is σ = 30695436. Its totient is φ = 10218832.

The previous prime is 20450623. The next prime is 20450659. The reversal of 20450642 is 24605402.

It can be written as a sum of positive squares in 2 ways, for example, as 17631601 + 2819041 = 4199^2 + 1679^2 .

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, 3488 + ... + 7284.

Almost surely, 2^20450642 is an apocalyptic number.

20450642 is a deficient number, since it is larger than the sum of its proper divisors (10244794).

20450642 is a wasteful number, since it uses less digits than its factorization.

20450642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6492.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 20450642 is about 4522.2386049389. The cubic root of 20450642 is about 273.4653559453.

The spelling of 20450642 in words is "twenty million, four hundred fifty thousand, six hundred forty-two".