220618429 has 2 divisors, whose sum is σ = 220618430. Its totient is φ = 220618428.

The previous prime is 220618427. The next prime is 220618459. The reversal of 220618429 is 924816022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213452100 + 7166329 = 14610^2 + 2677^2 .

It is a cyclic number.

It is not a de Polignac number, because 220618429 - 2¹ = 220618427 is a prime.

Together with 220618427, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 220618394 and 220618403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220618421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110309214 + 110309215.

It is an arithmetic number, because the mean of its divisors is an integer number (110309215).

Almost surely, 2^220618429 is an apocalyptic number.

It is an amenable number.

220618429 is a deficient number, since it is larger than the sum of its proper divisors (1).

220618429 is an equidigital number, since it uses as much as digits as its factorization.

220618429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 220618429 is about 14853.2295814749. The cubic root of 220618429 is about 604.2462018753.

The spelling of 220618429 in words is "two hundred twenty million, six hundred eighteen thousand, four hundred twenty-nine".