20002418 has 4 divisors (see below), whose sum is σ = 30003630. Its totient is φ = 10001208.

The previous prime is 20002417. The next prime is 20002429. The reversal of 20002418 is 81420002.

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., 16999129 + 3003289 = 4123^2 + 1733^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20002396 and 20002405.

It is not an unprimeable number, because it can be changed into a prime (20002417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000603 + ... + 5000606.

Almost surely, 2^20002418 is an apocalyptic number.

20002418 is a deficient number, since it is larger than the sum of its proper divisors (10001212).

20002418 is a wasteful number, since it uses less digits than its factorization.

20002418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10001211.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 20002418 is about 4472.4062874475. The cubic root of 20002418 is about 271.4527003217.

The spelling of 20002418 in words is "twenty million, two thousand, four hundred eighteen".