20923500 has 192 divisors, whose sum is σ = 69713280. Its totient is φ = 4838400.

The previous prime is 20923493. The next prime is 20923517. The reversal of 20923500 is 532902.

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 63 ways as a sum of consecutive naturals, for example, 565482 + ... + 565518.

It is an arithmetic number, because the mean of its divisors is an integer number (363090).

Almost surely, 2^20923500 is an apocalyptic number.

20923500 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 20923500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34856640).

20923500 is an abundant number, since it is smaller than the sum of its proper divisors (48789780).

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

20923500 is a wasteful number, since it uses less digits than its factorization.

20923500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 20923500 is about 4574.2212451957. The cubic root of 20923500 is about 275.5569977908.

The spelling of 20923500 in words is "twenty million, nine hundred twenty-three thousand, five hundred".