20100418 has 8 divisors (see below), whose sum is σ = 32469948. Its totient is φ = 9277104.

The previous prime is 20100403. The next prime is 20100419. The reversal of 20100418 is 81400102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19686969 + 413449 = 4437^2 + 643^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20100419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386521 + ... + 386572.

Almost surely, 2^20100418 is an apocalyptic number.

20100418 is a deficient number, since it is larger than the sum of its proper divisors (12369530).

20100418 is a wasteful number, since it uses less digits than its factorization.

20100418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773108.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 20100418 is about 4483.3489714721. The cubic root of 20100418 is about 271.8952974321.

The spelling of 20100418 in words is "twenty million, one hundred thousand, four hundred eighteen".