220421434643 has 8 divisors (see below), whose sum is σ = 221106910128. Its totient is φ = 219736145664.

The previous prime is 220421434633. The next prime is 220421434661. The reversal of 220421434643 is 346434124022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 220421434643 - 2¹⁰ = 220421433619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220421434633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2543180 + ... + 2628422.

It is an arithmetic number, because the mean of its divisors is an integer number (27638363766).

Almost surely, 2^220421434643 is an apocalyptic number.

220421434643 is a deficient number, since it is larger than the sum of its proper divisors (685475485).

220421434643 is an equidigital number, since it uses as much as digits as its factorization.

220421434643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93253.

The product of its (nonzero) digits is 110592, while the sum is 35.

Adding to 220421434643 its reverse (346434124022), we get a palindrome (566855558665).

The spelling of 220421434643 in words is "two hundred twenty billion, four hundred twenty-one million, four hundred thirty-four thousand, six hundred forty-three".