20022071 has 4 divisors (see below), whose sum is σ = 20304144. Its totient is φ = 19740000.

The previous prime is 20022059. The next prime is 20022089. The reversal of 20022071 is 17022002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17022002 = 2 ⋅8511001.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20022071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022011) 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, 140930 + ... + 141071.

It is an arithmetic number, because the mean of its divisors is an integer number (5076036).

Almost surely, 2^20022071 is an apocalyptic number.

20022071 is a deficient number, since it is larger than the sum of its proper divisors (282073).

20022071 is an equidigital number, since it uses as much as digits as its factorization.

20022071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282072.

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 20022071 is about 4474.6028874080. The cubic root of 20022071 is about 271.5415748043.

Adding to 20022071 its reverse (17022002), we get a palindrome (37044073).

The spelling of 20022071 in words is "twenty million, twenty-two thousand, seventy-one".