20022005 has 8 divisors (see below), whose sum is σ = 25439832. Its totient is φ = 15075328.

The previous prime is 20021999. The next prime is 20022011. The reversal of 20022005 is 50022002.

It is an interprime number because it is at equal distance from previous prime (20021999) and next prime (20022011).

It can be written as a sum of positive squares in 4 ways, for example, as 6895876 + 13126129 = 2626^2 + 3623^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-20022005 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117692 + ... + 117861.

It is an arithmetic number, because the mean of its divisors is an integer number (3179979).

Almost surely, 2^20022005 is an apocalyptic number.

It is an amenable number.

20022005 is a deficient number, since it is larger than the sum of its proper divisors (5417827).

20022005 is a wasteful number, since it uses less digits than its factorization.

20022005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235575.

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 20022005 is about 4474.5955124458. The cubic root of 20022005 is about 271.5412764375.

Adding to 20022005 its reverse (50022002), we get a palindrome (70044007).

The spelling of 20022005 in words is "twenty million, twenty-two thousand, five".