19813896 has 40 divisors (see below), whose sum is σ = 55499070. Its totient is φ = 6604416.

The previous prime is 19813883. The next prime is 19813897. The reversal of 19813896 is 69831891.

It can be written as a sum of positive squares in only one way, i.e., 17892900 + 1920996 = 4230^2 + 1386^2 .

It is a super-3 number, since 3×19813896³ (a number of 23 digits) contains 333 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (19813897) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 14641 + ... + 15936.

Almost surely, 2^19813896 is an apocalyptic number.

It is an amenable number.

19813896 is an abundant number, since it is smaller than the sum of its proper divisors (35685174).

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

19813896 is a wasteful number, since it uses less digits than its factorization.

19813896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30595 (or 30582 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 19813896 is about 4451.2802652720. The cubic root of 19813896 is about 270.5971966416.

The spelling of 19813896 in words is "nineteen million, eight hundred thirteen thousand, eight hundred ninety-six".