19899708 has 12 divisors (see below), whose sum is σ = 46432680. Its totient is φ = 6633232.

The previous prime is 19899689. The next prime is 19899721. The reversal of 19899708 is 80799891.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 829143 + ... + 829166.

It is an arithmetic number, because the mean of its divisors is an integer number (3869390).

Almost surely, 2^19899708 is an apocalyptic number.

It is an amenable number.

19899708 is an abundant number, since it is smaller than the sum of its proper divisors (26532972).

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

19899708 is a wasteful number, since it uses less digits than its factorization.

19899708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658316 (or 1658314 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 51.

The square root of 19899708 is about 4460.9088760027. The cubic root of 19899708 is about 270.9872771722.

The spelling of 19899708 in words is "nineteen million, eight hundred ninety-nine thousand, seven hundred eight".