19949796 has 72 divisors (see below), whose sum is σ = 52972920. Its totient is φ = 6322176.

The previous prime is 19949779. The next prime is 19949819. The reversal of 19949796 is 69794991.

It can be written as a sum of positive squares in 4 ways, for example, as 8294400 + 11655396 = 2880^2 + 3414^2 .

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101170 + ... + 101366.

It is an arithmetic number, because the mean of its divisors is an integer number (735735).

Almost surely, 2^19949796 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19949796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26486460).

19949796 is an abundant number, since it is smaller than the sum of its proper divisors (33023124).

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

19949796 is a wasteful number, since it uses less digits than its factorization.

19949796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333 (or 328 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The square root of 19949796 is about 4466.5194503103. The cubic root of 19949796 is about 271.2144469815.

The spelling of 19949796 in words is "nineteen million, nine hundred forty-nine thousand, seven hundred ninety-six".