20426006 has 4 divisors (see below), whose sum is σ = 30639012. Its totient is φ = 10213002.

The previous prime is 20425987. The next prime is 20426009. The reversal of 20426006 is 60062402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60062402 = 2 ⋅30031201.

It is a super-2 number, since 2×20426006² = 834443442224072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20426009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5106500 + ... + 5106503.

It is an arithmetic number, because the mean of its divisors is an integer number (7659753).

Almost surely, 2^20426006 is an apocalyptic number.

20426006 is a deficient number, since it is larger than the sum of its proper divisors (10213006).

20426006 is a wasteful number, since it uses less digits than its factorization.

20426006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10213005.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 20426006 is about 4519.5139119157. The cubic root of 20426006 is about 273.3555012096.

Adding to 20426006 its reverse (60062402), we get a palindrome (80488408).

The spelling of 20426006 in words is "twenty million, four hundred twenty-six thousand, six".