20360042 has 4 divisors (see below), whose sum is σ = 30540066. Its totient is φ = 10180020.

The previous prime is 20360029. The next prime is 20360051. The reversal of 20360042 is 24006302.

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., 14508481 + 5851561 = 3809^2 + 2419^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20360042.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5090009 + ... + 5090012.

Almost surely, 2^20360042 is an apocalyptic number.

20360042 is a deficient number, since it is larger than the sum of its proper divisors (10180024).

20360042 is a wasteful number, since it uses less digits than its factorization.

20360042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10180023.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 20360042 is about 4512.2103231122. The cubic root of 20360042 is about 273.0609246504.

Adding to 20360042 its reverse (24006302), we get a palindrome (44366344).

The spelling of 20360042 in words is "twenty million, three hundred sixty thousand, forty-two".