20426016 has 72 divisors (see below), whose sum is σ = 58106160. Its totient is φ = 6279936.

The previous prime is 20426009. The next prime is 20426017. The reversal of 20426016 is 61062402.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20425983 and 20426001.

It is not an unprimeable number, because it can be changed into a prime (20426017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15595 + ... + 16853.

It is an arithmetic number, because the mean of its divisors is an integer number (807030).

Almost surely, 2^20426016 is an apocalyptic number.

20426016 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20426016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29053080).

20426016 is an abundant number, since it is smaller than the sum of its proper divisors (37680144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20426016 is a wasteful number, since it uses less digits than its factorization.

20426016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298 (or 1277 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 20426016 is about 4519.5150182293. The cubic root of 20426016 is about 273.3555458186.

Adding to 20426016 its reverse (61062402), we get a palindrome (81488418).

The spelling of 20426016 in words is "twenty million, four hundred twenty-six thousand, sixteen".