19939316 has 6 divisors (see below), whose sum is σ = 34893810. Its totient is φ = 9969656.

The previous prime is 19939313. The next prime is 19939349. The reversal of 19939316 is 61393991.

It can be written as a sum of positive squares in only one way, i.e., 11587216 + 8352100 = 3404^2 + 2890^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19939313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2492411 + ... + 2492418.

It is an arithmetic number, because the mean of its divisors is an integer number (5815635).

Almost surely, 2^19939316 is an apocalyptic number.

It is an amenable number.

19939316 is a deficient number, since it is larger than the sum of its proper divisors (14954494).

19939316 is a wasteful number, since it uses less digits than its factorization.

19939316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4984833 (or 4984831 counting only the distinct ones).

The product of its digits is 39366, while the sum is 41.

The square root of 19939316 is about 4465.3461232025. The cubic root of 19939316 is about 271.1669473268.

The spelling of 19939316 in words is "nineteen million, nine hundred thirty-nine thousand, three hundred sixteen".