20042174 has 4 divisors (see below), whose sum is σ = 30063264. Its totient is φ = 10021086.

The previous prime is 20042173. The next prime is 20042249. The reversal of 20042174 is 47124002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47124002 = 2 ⋅23562001.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20042173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010542 + ... + 5010545.

It is an arithmetic number, because the mean of its divisors is an integer number (7515816).

Almost surely, 2^20042174 is an apocalyptic number.

20042174 is a deficient number, since it is larger than the sum of its proper divisors (10021090).

20042174 is a wasteful number, since it uses less digits than its factorization.

20042174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10021089.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 20042174 is about 4476.8486684274. The cubic root of 20042174 is about 271.6324241199.

Adding to 20042174 its reverse (47124002), we get a palindrome (67166176).

The spelling of 20042174 in words is "twenty million, forty-two thousand, one hundred seventy-four".