19799766 has 24 divisors (see below), whose sum is σ = 49028304. Its totient is φ = 5657040.

The previous prime is 19799749. The next prime is 19799783. The reversal of 19799766 is 66799791.

It is an interprime number because it is at equal distance from previous prime (19799749) and next prime (19799783).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78445 + ... + 78696.

It is an arithmetic number, because the mean of its divisors is an integer number (2042846).

Almost surely, 2^19799766 is an apocalyptic number.

19799766 is an abundant number, since it is smaller than the sum of its proper divisors (29228538).

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

19799766 is a wasteful number, since it uses less digits than its factorization.

19799766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157156 (or 157153 counting only the distinct ones).

The product of its digits is 1285956, while the sum is 54.

The square root of 19799766 is about 4449.6927983851. The cubic root of 19799766 is about 270.5328571556.

The spelling of 19799766 in words is "nineteen million, seven hundred ninety-nine thousand, seven hundred sixty-six".