20679500 has 48 divisors (see below), whose sum is σ = 45995040. Its totient is φ = 8120000.

The previous prime is 20679499. The next prime is 20679509. The reversal of 20679500 is 597602.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20679509) by changing a digit.

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, 29150 + ... + 29850.

It is an arithmetic number, because the mean of its divisors is an integer number (958230).

Almost surely, 2^20679500 is an apocalyptic number.

20679500 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 20679500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22997520).

20679500 is an abundant number, since it is smaller than the sum of its proper divisors (25315540).

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

20679500 is a wasteful number, since it uses less digits than its factorization.

20679500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779 (or 767 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 20679500 is about 4547.4718250914. The cubic root of 20679500 is about 274.4816682682.

The spelling of 20679500 in words is "twenty million, six hundred seventy-nine thousand, five hundred".