20345208 has 64 divisors (see below), whose sum is σ = 55725600. Its totient is φ = 6151680.

The previous prime is 20345167. The next prime is 20345231. The reversal of 20345208 is 80254302.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18498 + ... + 19566.

Almost surely, 2^20345208 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 20345208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27862800).

20345208 is an abundant number, since it is smaller than the sum of its proper divisors (35380392).

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

20345208 is a wasteful number, since it uses less digits than its factorization.

20345208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152 (or 1148 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 20345208 is about 4510.5662615685. The cubic root of 20345208 is about 272.9945926018.

The spelling of 20345208 in words is "twenty million, three hundred forty-five thousand, two hundred eight".