19925000 has 48 divisors (see below), whose sum is σ = 46754820. Its totient is φ = 7960000.

The previous prime is 19924987. The next prime is 19925011. The reversal of 19925000 is 52991.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 2502724 + 17422276 = 1582^2 + 4174^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24602 + ... + 25398.

Almost surely, 2^19925000 is an apocalyptic number.

19925000 is a gapful number since it is divisible by the number (10) 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 19925000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23377410).

19925000 is an abundant number, since it is smaller than the sum of its proper divisors (26829820).

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

19925000 is an frugal number, since it uses more digits than its factorization.

19925000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828 (or 804 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 19925000 is about 4463.7428241331. The cubic root of 19925000 is about 271.1020344438.

Adding to 19925000 its reverse (52991), we get a palindrome (19977991).

The spelling of 19925000 in words is "nineteen million, nine hundred twenty-five thousand".