20042395 has 8 divisors (see below), whose sum is σ = 24130080. Its totient is φ = 15981120.

The previous prime is 20042389. The next prime is 20042413. The reversal of 20042395 is 59324002.

It is a happy number.

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

It is not a de Polignac number, because 20042395 - 2¹⁷ = 19911323 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4890 + ... + 7999.

It is an arithmetic number, because the mean of its divisors is an integer number (3016260).

Almost surely, 2^20042395 is an apocalyptic number.

20042395 is a deficient number, since it is larger than the sum of its proper divisors (4087685).

20042395 is a wasteful number, since it uses less digits than its factorization.

20042395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13205.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 20042395 is about 4476.8733509002. The cubic root of 20042395 is about 271.6334225236.

Adding to 20042395 its reverse (59324002), we get a palindrome (79366397).

The spelling of 20042395 in words is "twenty million, forty-two thousand, three hundred ninety-five".