20042115 has 8 divisors (see below), whose sum is σ = 32067408. Its totient is φ = 10689120.

The previous prime is 20042107. The next prime is 20042117. The reversal of 20042115 is 51124002.

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

It is not a de Polignac number, because 20042115 - 2³ = 20042107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 1336141 = 20042115 / (2 + 0 + 0 + 4 + 2 + 1 + 1 + 5).

It is a junction number, because it is equal to n+sod(n) for n = 20042094 and 20042103.

It is not an unprimeable number, because it can be changed into a prime (20042117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 668056 + ... + 668085.

It is an arithmetic number, because the mean of its divisors is an integer number (4008426).

Almost surely, 2^20042115 is an apocalyptic number.

20042115 is a deficient number, since it is larger than the sum of its proper divisors (12025293).

20042115 is a wasteful number, since it uses less digits than its factorization.

20042115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336149.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 20042115 is about 4476.8420789659. The cubic root of 20042115 is about 271.6321575764.

Adding to 20042115 its reverse (51124002), we get a palindrome (71166117).

The spelling of 20042115 in words is "twenty million, forty-two thousand, one hundred fifteen".