220021402 has 8 divisors (see below), whose sum is σ = 330113556. Its totient is φ = 109983552.

The previous prime is 220021397. The next prime is 220021409. The reversal of 220021402 is 204120022.

It can be written as a sum of positive squares in 2 ways, for example, as 174741961 + 45279441 = 13219^2 + 6729^2 .

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

It is not an unprimeable number, because it can be changed into a prime (220021409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1183 + ... + 21010.

Almost surely, 2^220021402 is an apocalyptic number.

220021402 is a deficient number, since it is larger than the sum of its proper divisors (110092154).

220021402 is a wasteful number, since it uses less digits than its factorization.

220021402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27152.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 220021402 is about 14833.1184179187. The cubic root of 220021402 is about 603.7006487758.

Adding to 220021402 its reverse (204120022), we get a palindrome (424141424).

The spelling of 220021402 in words is "two hundred twenty million, twenty-one thousand, four hundred two".