19940225 has 12 divisors (see below), whose sum is σ = 25395324. Its totient is φ = 15520320.

The previous prime is 19940191. The next prime is 19940237. The reversal of 19940225 is 52204991.

It can be written as a sum of positive squares in 6 ways, for example, as 430336 + 19509889 = 656^2 + 4417^2 .

It is not a de Polignac number, because 19940225 - 2¹⁰ = 19939201 is a prime.

It is a super-2 number, since 2×19940225² = 795225146101250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19940191 and 19940200.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9854 + ... + 11703.

It is an arithmetic number, because the mean of its divisors is an integer number (2116277).

Almost surely, 2^19940225 is an apocalyptic number.

It is an amenable number.

19940225 is a deficient number, since it is larger than the sum of its proper divisors (5455099).

19940225 is a wasteful number, since it uses less digits than its factorization.

19940225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21604 (or 21599 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 19940225 is about 4465.4479058657. The cubic root of 19940225 is about 271.1710679464.

The spelling of 19940225 in words is "nineteen million, nine hundred forty thousand, two hundred twenty-five".