19989704 has 16 divisors (see below), whose sum is σ = 42835200. Its totient is φ = 8566992.

The previous prime is 19989701. The next prime is 19989707. The reversal of 19989704 is 40798991.

It is an interprime number because it is at equal distance from previous prime (19989701) and next prime (19989707).

It is not an unprimeable number, because it can be changed into a prime (19989701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178424 + ... + 178535.

It is an arithmetic number, because the mean of its divisors is an integer number (2677200).

Almost surely, 2^19989704 is an apocalyptic number.

19989704 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19989704 is an abundant number, since it is smaller than the sum of its proper divisors (22845496).

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

19989704 is a wasteful number, since it uses less digits than its factorization.

19989704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356972 (or 356968 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 19989704 is about 4470.9846790165. The cubic root of 19989704 is about 271.3951742579.

The spelling of 19989704 in words is "nineteen million, nine hundred eighty-nine thousand, seven hundred four".