20925000 has 192 divisors, whose sum is σ = 74995200. Its totient is φ = 5400000.

The previous prime is 20924987. The next prime is 20925019. The reversal of 20925000 is 52902.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 674985 + ... + 675015.

It is an arithmetic number, because the mean of its divisors is an integer number (390600).

Almost surely, 2^20925000 is an apocalyptic number.

20925000 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 20925000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37497600).

20925000 is an abundant number, since it is smaller than the sum of its proper divisors (54070200).

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

20925000 is an equidigital number, since it uses as much as digits as its factorization.

20925000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 20925000 is about 4574.3852045931. The cubic root of 20925000 is about 275.5635825021.

Adding to 20925000 its reverse (52902), we get a palindrome (20977902).

The spelling of 20925000 in words is "twenty million, nine hundred twenty-five thousand".