20018354 has 4 divisors (see below), whose sum is σ = 30027534. Its totient is φ = 10009176.

The previous prime is 20018351. The next prime is 20018357. The reversal of 20018354 is 45381002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45381002 = 2 ⋅22690501.

It is an interprime number because it is at equal distance from previous prime (20018351) and next prime (20018357).

It can be written as a sum of positive squares in only one way, i.e., 11404129 + 8614225 = 3377^2 + 2935^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20018351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5004587 + ... + 5004590.

Almost surely, 2^20018354 is an apocalyptic number.

20018354 is a deficient number, since it is larger than the sum of its proper divisors (10009180).

20018354 is a wasteful number, since it uses less digits than its factorization.

20018354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10009179.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 20018354 is about 4474.1875240092. The cubic root of 20018354 is about 271.5247703072.

Adding to 20018354 its reverse (45381002), we get a palindrome (65399356).

The spelling of 20018354 in words is "twenty million, eighteen thousand, three hundred fifty-four".