20018626 has 4 divisors (see below), whose sum is σ = 30027942. Its totient is φ = 10009312.

The previous prime is 20018617. The next prime is 20018651. The reversal of 20018626 is 62681002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17631601 + 2387025 = 4199^2 + 1545^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20018626.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5004655 + ... + 5004658.

Almost surely, 2^20018626 is an apocalyptic number.

20018626 is a deficient number, since it is larger than the sum of its proper divisors (10009316).

20018626 is a wasteful number, since it uses less digits than its factorization.

20018626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10009315.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 20018626 is about 4474.2179204862. The cubic root of 20018626 is about 271.5260000854.

Adding to 20018626 its reverse (62681002), we get a palindrome (82699628).

The spelling of 20018626 in words is "twenty million, eighteen thousand, six hundred twenty-six".