20349418 has 8 divisors (see below), whose sum is σ = 32130720. Its totient is φ = 9639180.

The previous prime is 20349389. The next prime is 20349421. The reversal of 20349418 is 81494302.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20349418.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267718 + ... + 267793.

It is an arithmetic number, because the mean of its divisors is an integer number (4016340).

Almost surely, 2^20349418 is an apocalyptic number.

20349418 is a deficient number, since it is larger than the sum of its proper divisors (11781302).

20349418 is a wasteful number, since it uses less digits than its factorization.

20349418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535532.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 20349418 is about 4511.0329194099. The cubic root of 20349418 is about 273.0134214085.

The spelling of 20349418 in words is "twenty million, three hundred forty-nine thousand, four hundred eighteen".