220857923 has 16 divisors (see below), whose sum is σ = 263036256. Its totient is φ = 182787840.

The previous prime is 220857911. The next prime is 220857977. The reversal of 220857923 is 329758022.

It is a cyclic number.

It is not a de Polignac number, because 220857923 - 2²⁴ = 204080707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220850923) 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 15 ways as a sum of consecutive naturals, for example, 140 + ... + 21017.

It is an arithmetic number, because the mean of its divisors is an integer number (16439766).

Almost surely, 2^220857923 is an apocalyptic number.

220857923 is a deficient number, since it is larger than the sum of its proper divisors (42178333).

220857923 is a wasteful number, since it uses less digits than its factorization.

220857923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21254.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 220857923 is about 14861.2894124299. The cubic root of 220857923 is about 604.4647708123.

The spelling of 220857923 in words is "two hundred twenty million, eight hundred fifty-seven thousand, nine hundred twenty-three".