20021035 has 4 divisors (see below), whose sum is σ = 24025248. Its totient is φ = 16016824.

The previous prime is 20021021. The next prime is 20021059. The reversal of 20021035 is 53012002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20021035 - 2¹³ = 20012843 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2002099 + ... + 2002108.

It is an arithmetic number, because the mean of its divisors is an integer number (6006312).

Almost surely, 2^20021035 is an apocalyptic number.

20021035 is a deficient number, since it is larger than the sum of its proper divisors (4004213).

20021035 is an equidigital number, since it uses as much as digits as its factorization.

20021035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4004212.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 20021035 is about 4474.4871214476. The cubic root of 20021035 is about 271.5368912740.

Adding to 20021035 its reverse (53012002), we get a palindrome (73033037).

The spelling of 20021035 in words is "twenty million, twenty-one thousand, thirty-five".