220418385 has 16 divisors (see below), whose sum is σ = 384730560. Its totient is φ = 106869440.

The previous prime is 220418381. The next prime is 220418399. The reversal of 220418385 is 583814022.

It is not a de Polignac number, because 220418385 - 2² = 220418381 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (220418381) 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, 667770 + ... + 668099.

It is an arithmetic number, because the mean of its divisors is an integer number (24045660).

Almost surely, 2^220418385 is an apocalyptic number.

It is an amenable number.

220418385 is a deficient number, since it is larger than the sum of its proper divisors (164312175).

220418385 is a wasteful number, since it uses less digits than its factorization.

220418385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335888.

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 220418385 is about 14846.4940305784. The cubic root of 220418385 is about 604.0635148403.

The spelling of 220418385 in words is "two hundred twenty million, four hundred eighteen thousand, three hundred eighty-five".