20426208 has 144 divisors (see below), whose sum is σ = 63213696. Its totient is φ = 5716480.

The previous prime is 20426201. The next prime is 20426209. The reversal of 20426208 is 80262402.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20426201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 704338 + ... + 704366.

It is an arithmetic number, because the mean of its divisors is an integer number (438984).

Almost surely, 2^20426208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20426208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31606848).

20426208 is an abundant number, since it is smaller than the sum of its proper divisors (42787488).

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

20426208 is a wasteful number, since it uses less digits than its factorization.

20426208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 20426208 is about 4519.5362593965. The cubic root of 20426208 is about 273.3564023097.

The spelling of 20426208 in words is "twenty million, four hundred twenty-six thousand, two hundred eight".