19395940 has 12 divisors (see below), whose sum is σ = 40731516. Its totient is φ = 7758368.

The previous prime is 19395931. The next prime is 19395947. The reversal of 19395940 is 4959391.

It can be written as a sum of positive squares in 2 ways, for example, as 8386816 + 11009124 = 2896^2 + 3318^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19395893 and 19395902.

It is not an unprimeable number, because it can be changed into a prime (19395947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 484879 + ... + 484918.

It is an arithmetic number, because the mean of its divisors is an integer number (3394293).

Almost surely, 2^19395940 is an apocalyptic number.

19395940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19395940 is an abundant number, since it is smaller than the sum of its proper divisors (21335576).

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

19395940 is a wasteful number, since it uses less digits than its factorization.

19395940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969806 (or 969804 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 19395940 is about 4404.0821972347. The cubic root of 19395940 is about 268.6809925582.

The spelling of 19395940 in words is "nineteen million, three hundred ninety-five thousand, nine hundred forty".