20021110207 has 4 divisors (see below), whose sum is σ = 22881268816. Its totient is φ = 17160951600.

The previous prime is 20021110177. The next prime is 20021110223. The reversal of 20021110207 is 70201112002.

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 20021110207 - 2⁷ = 20021110079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021110507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1430079294 + ... + 1430079307.

It is an arithmetic number, because the mean of its divisors is an integer number (5720317204).

Almost surely, 2^20021110207 is an apocalyptic number.

20021110207 is a deficient number, since it is larger than the sum of its proper divisors (2860158609).

20021110207 is an equidigital number, since it uses as much as digits as its factorization.

20021110207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2860158608.

The product of its (nonzero) digits is 56, while the sum is 16.

Adding to 20021110207 its reverse (70201112002), we get a palindrome (90222222209).

The spelling of 20021110207 in words is "twenty billion, twenty-one million, one hundred ten thousand, two hundred seven".