20022406 has 4 divisors (see below), whose sum is σ = 30033612. Its totient is φ = 10011202.

The previous prime is 20022323. The next prime is 20022407. The reversal of 20022406 is 60422002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60422002 = 2 ⋅30211001.

It is a self number, because there is not a number n which added to its sum of digits gives 20022406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005600 + ... + 5005603.

It is an arithmetic number, because the mean of its divisors is an integer number (7508403).

Almost surely, 2^20022406 is an apocalyptic number.

20022406 is a deficient number, since it is larger than the sum of its proper divisors (10011206).

20022406 is a wasteful number, since it uses less digits than its factorization.

20022406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10011205.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20022406 is about 4474.6403207409. The cubic root of 20022406 is about 271.5430892317.

Adding to 20022406 its reverse (60422002), we get a palindrome (80444408).

The spelling of 20022406 in words is "twenty million, twenty-two thousand, four hundred six".