19989034 has 16 divisors (see below), whose sum is σ = 32528160. Its totient is φ = 9157680.

The previous prime is 19988993. The next prime is 19989037. The reversal of 19989034 is 43098991.

It is a super-2 number, since 2×19989034² = 799122960506312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19989037) 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, 849 + ... + 6379.

It is an arithmetic number, because the mean of its divisors is an integer number (2033010).

Almost surely, 2^19989034 is an apocalyptic number.

19989034 is a deficient number, since it is larger than the sum of its proper divisors (12539126).

19989034 is a wasteful number, since it uses less digits than its factorization.

19989034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5685.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 19989034 is about 4470.9097508225. The cubic root of 19989034 is about 271.3921420836.

Subtracting from 19989034 its sum of digits (43), we obtain a palindrome (19988991).

The spelling of 19989034 in words is "nineteen million, nine hundred eighty-nine thousand, thirty-four".