20339500 has 48 divisors (see below), whose sum is σ = 46781280. Its totient is φ = 7704000.

The previous prime is 20339491. The next prime is 20339533. The reversal of 20339500 is 593302.

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, 8430 + ... + 10570.

It is an arithmetic number, because the mean of its divisors is an integer number (974610).

Almost surely, 2^20339500 is an apocalyptic number.

20339500 is a gapful number since it is divisible by the number (20) 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 20339500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23390640).

20339500 is an abundant number, since it is smaller than the sum of its proper divisors (26441780).

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

20339500 is a wasteful number, since it uses less digits than its factorization.

20339500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2179 (or 2167 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 22.

The square root of 20339500 is about 4509.9334806624. The cubic root of 20339500 is about 272.9690599901.

The spelling of 20339500 in words is "twenty million, three hundred thirty-nine thousand, five hundred".