20018374 has 8 divisors (see below), whose sum is σ = 30996288. Its totient is φ = 9686280.

The previous prime is 20018357. The next prime is 20018377. The reversal of 20018374 is 47381002.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20018377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161377 + ... + 161500.

It is an arithmetic number, because the mean of its divisors is an integer number (3874536).

Almost surely, 2^20018374 is an apocalyptic number.

20018374 is a deficient number, since it is larger than the sum of its proper divisors (10977914).

20018374 is a wasteful number, since it uses less digits than its factorization.

20018374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322910.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 20018374 is about 4474.1897590514. The cubic root of 20018374 is about 271.5248607325.

Adding to 20018374 its reverse (47381002), we get a palindrome (67399376).

The spelling of 20018374 in words is "twenty million, eighteen thousand, three hundred seventy-four".