20019925 has 12 divisors (see below), whose sum is σ = 24899076. Its totient is φ = 15968000.

The previous prime is 20019907. The next prime is 20019929. The reversal of 20019925 is 52991002.

It can be written as a sum of positive squares in 6 ways, for example, as 253009 + 19766916 = 503^2 + 4446^2 .

It is not a de Polignac number, because 20019925 - 2¹⁷ = 19888853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20019893 and 20019902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20019929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9027 + ... + 11023.

It is an arithmetic number, because the mean of its divisors is an integer number (2074923).

Almost surely, 2^20019925 is an apocalyptic number.

20019925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20019925 is a deficient number, since it is larger than the sum of its proper divisors (4879151).

20019925 is a wasteful number, since it uses less digits than its factorization.

20019925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408 (or 2403 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 20019925 is about 4474.3630831661. The cubic root of 20019925 is about 271.5318730266.

The spelling of 20019925 in words is "twenty million, nineteen thousand, nine hundred twenty-five".