20573500 has 48 divisors (see below), whose sum is σ = 46912320. Its totient is φ = 7867200.

The previous prime is 20573471. The next prime is 20573503. The reversal of 20573500 is 537502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20573503) 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, 10606 + ... + 12394.

It is an arithmetic number, because the mean of its divisors is an integer number (977340).

Almost surely, 2^20573500 is an apocalyptic number.

20573500 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 20573500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23456160).

20573500 is an abundant number, since it is smaller than the sum of its proper divisors (26338820).

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

20573500 is a wasteful number, since it uses less digits than its factorization.

20573500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1831 (or 1819 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 22.

The square root of 20573500 is about 4535.8020238983. The cubic root of 20573500 is about 274.0118807785.

The spelling of 20573500 in words is "twenty million, five hundred seventy-three thousand, five hundred".