20183642 has 4 divisors (see below), whose sum is σ = 30275466. Its totient is φ = 10091820.

The previous prime is 20183621. The next prime is 20183651. The reversal of 20183642 is 24638102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19545241 + 638401 = 4421^2 + 799^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5045909 + ... + 5045912.

Almost surely, 2^20183642 is an apocalyptic number.

20183642 is a deficient number, since it is larger than the sum of its proper divisors (10091824).

20183642 is a wasteful number, since it uses less digits than its factorization.

20183642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10091823.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 20183642 is about 4492.6208386642. The cubic root of 20183642 is about 272.2700335169.

The spelling of 20183642 in words is "twenty million, one hundred eighty-three thousand, six hundred forty-two".