20736500 has 48 divisors (see below), whose sum is σ = 46038720. Its totient is φ = 8157600.

The previous prime is 20736491. The next prime is 20736509. The reversal of 20736500 is 563702.

It is an interprime number because it is at equal distance from previous prime (20736491) and next prime (20736509).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20736509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33191 + ... + 33809.

It is an arithmetic number, because the mean of its divisors is an integer number (959140).

Almost surely, 2^20736500 is an apocalyptic number.

20736500 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 20736500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23019360).

20736500 is an abundant number, since it is smaller than the sum of its proper divisors (25302220).

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

20736500 is a wasteful number, since it uses less digits than its factorization.

20736500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705 (or 693 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 20736500 is about 4553.7347309653. The cubic root of 20736500 is about 274.7336263630.

The spelling of 20736500 in words is "twenty million, seven hundred thirty-six thousand, five hundred".