19889012 has 72 divisors (see below), whose sum is σ = 43012200. Its totient is φ = 7983360.

The previous prime is 19888969. The next prime is 19889027. The reversal of 19889012 is 21098891.

It can be written as a sum of positive squares in 4 ways, for example, as 1860496 + 18028516 = 1364^2 + 4246^2 .

It is a super-2 number, since 2×19889012² = 791145596672288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 182414 + ... + 182522.

Almost surely, 2^19889012 is an apocalyptic number.

It is an amenable number.

19889012 is an abundant number, since it is smaller than the sum of its proper divisors (23123188).

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

19889012 is a wasteful number, since it uses less digits than its factorization.

19889012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 38.

The square root of 19889012 is about 4459.7098560332. The cubic root of 19889012 is about 270.9387170060.

The spelling of 19889012 in words is "nineteen million, eight hundred eighty-nine thousand, twelve".