20109418 has 8 divisors (see below), whose sum is σ = 34473312. Its totient is φ = 8618316.

The previous prime is 20109413. The next prime is 20109431. The reversal of 20109418 is 81490102.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 20109392 and 20109401.

It is not an unprimeable number, because it can be changed into a prime (20109413) 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, 718180 + ... + 718207.

It is an arithmetic number, because the mean of its divisors is an integer number (4309164).

Almost surely, 2^20109418 is an apocalyptic number.

20109418 is a deficient number, since it is larger than the sum of its proper divisors (14363894).

20109418 is a wasteful number, since it uses less digits than its factorization.

20109418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436396.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 20109418 is about 4484.3525731147. The cubic root of 20109418 is about 271.9358719207.

The spelling of 20109418 in words is "twenty million, one hundred nine thousand, four hundred eighteen".