220620353421 has 16 divisors (see below), whose sum is σ = 316814367744. Its totient is φ = 135755156544.

The previous prime is 220620353413. The next prime is 220620353423. The reversal of 220620353421 is 124353026022.

It is not a de Polignac number, because 220620353421 - 2³ = 220620353413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220620353423) 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, 257620 + ... + 712466.

It is an arithmetic number, because the mean of its divisors is an integer number (19800897984).

Almost surely, 2^220620353421 is an apocalyptic number.

It is an amenable number.

220620353421 is a deficient number, since it is larger than the sum of its proper divisors (96194014323).

220620353421 is a wasteful number, since it uses less digits than its factorization.

220620353421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467300.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 220620353421 its reverse (124353026022), we get a palindrome (344973379443).

The spelling of 220620353421 in words is "two hundred twenty billion, six hundred twenty million, three hundred fifty-three thousand, four hundred twenty-one".