220385020549 has 4 divisors (see below), whose sum is σ = 220419073836. Its totient is φ = 220350967264.

The previous prime is 220385020547. The next prime is 220385020573. The reversal of 220385020549 is 945020583022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23499357025 + 196885663524 = 153295^2 + 443718^2 .

It is a cyclic number.

It is not a de Polignac number, because 220385020549 - 2¹ = 220385020547 is a prime.

It is a super-2 number, since 2×220385020549² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220385020547) 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, 17016934 + ... + 17029879.

It is an arithmetic number, because the mean of its divisors is an integer number (55104768459).

Almost surely, 2^220385020549 is an apocalyptic number.

It is an amenable number.

220385020549 is a deficient number, since it is larger than the sum of its proper divisors (34053287).

220385020549 is an equidigital number, since it uses as much as digits as its factorization.

220385020549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34053286.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 220385020549 in words is "two hundred twenty billion, three hundred eighty-five million, twenty thousand, five hundred forty-nine".