19649316 has 24 divisors (see below), whose sum is σ = 46093824. Its totient is φ = 6514720.

The previous prime is 19649309. The next prime is 19649317. The reversal of 19649316 is 61394691.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19649317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1995 + ... + 6578.

It is an arithmetic number, because the mean of its divisors is an integer number (1920576).

Almost surely, 2^19649316 is an apocalyptic number.

It is an amenable number.

19649316 is an abundant number, since it is smaller than the sum of its proper divisors (26444508).

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

19649316 is a wasteful number, since it uses less digits than its factorization.

19649316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8771 (or 8769 counting only the distinct ones).

The product of its digits is 34992, while the sum is 39.

The square root of 19649316 is about 4432.7548996081. The cubic root of 19649316 is about 269.8458928530.

The spelling of 19649316 in words is "nineteen million, six hundred forty-nine thousand, three hundred sixteen".