20042375 has 16 divisors (see below), whose sum is σ = 25259520. Its totient is φ = 15876000.

The previous prime is 20042357. The next prime is 20042389. The reversal of 20042375 is 57324002.

It is not a de Polignac number, because 20042375 - 2¹² = 20038279 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20042375.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12890 + ... + 14360.

It is an arithmetic number, because the mean of its divisors is an integer number (1578720).

Almost surely, 2^20042375 is an apocalyptic number.

20042375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20042375 is a deficient number, since it is larger than the sum of its proper divisors (5217145).

20042375 is a wasteful number, since it uses less digits than its factorization.

20042375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1595 (or 1585 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 20042375 is about 4476.8711171978. The cubic root of 20042375 is about 271.6333321706.

Adding to 20042375 its reverse (57324002), we get a palindrome (77366377).

The spelling of 20042375 in words is "twenty million, forty-two thousand, three hundred seventy-five".