20469218 has 32 divisors (see below), whose sum is σ = 39951360. Its totient is φ = 7626960.

The previous prime is 20469217. The next prime is 20469227. The reversal of 20469218 is 81296402.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20469217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 653 + ... + 6431.

It is an arithmetic number, because the mean of its divisors is an integer number (1248480).

Almost surely, 2^20469218 is an apocalyptic number.

20469218 is a deficient number, since it is larger than the sum of its proper divisors (19482142).

20469218 is a wasteful number, since it uses less digits than its factorization.

20469218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5822.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 20469218 is about 4524.2919888089. The cubic root of 20469218 is about 273.5481301217.

The spelling of 20469218 in words is "twenty million, four hundred sixty-nine thousand, two hundred eighteen".