20035221 has 8 divisors (see below), whose sum is σ = 26790720. Its totient is φ = 13318272.

The previous prime is 20035217. The next prime is 20035229. The reversal of 20035221 is 12253002.

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

It is not a de Polignac number, because 20035221 - 2² = 20035217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20035221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20035229) 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 7 ways as a sum of consecutive naturals, for example, 8401 + ... + 10518.

It is an arithmetic number, because the mean of its divisors is an integer number (3348840).

Almost surely, 2^20035221 is an apocalyptic number.

It is an amenable number.

20035221 is a deficient number, since it is larger than the sum of its proper divisors (6755499).

20035221 is a wasteful number, since it uses less digits than its factorization.

20035221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19275.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20035221 is about 4476.0720503584. The cubic root of 20035221 is about 271.6010090533.

Adding to 20035221 its reverse (12253002), we get a palindrome (32288223).

The spelling of 20035221 in words is "twenty million, thirty-five thousand, two hundred twenty-one".