220384993 has 4 divisors (see below), whose sum is σ = 221356080. Its totient is φ = 219413908.

The previous prime is 220384981. The next prime is 220384999. The reversal of 220384993 is 399483022.

220384993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220384993 is a prime.

It is a super-2 number, since 2×220384993² = 97139090279220098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220384999) 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, 485203 + ... + 485656.

It is an arithmetic number, because the mean of its divisors is an integer number (55339020).

Almost surely, 2^220384993 is an apocalyptic number.

It is an amenable number.

220384993 is a deficient number, since it is larger than the sum of its proper divisors (971087).

220384993 is an equidigital number, since it uses as much as digits as its factorization.

220384993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971086.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 220384993 is about 14845.3694127159. The cubic root of 220384993 is about 604.0330093578.

The spelling of 220384993 in words is "two hundred twenty million, three hundred eighty-four thousand, nine hundred ninety-three".