19989027 has 12 divisors (see below), whose sum is σ = 28912624. Its totient is φ = 13307760.

The previous prime is 19988993. The next prime is 19989037. The reversal of 19989027 is 72098991.

It is not a de Polignac number, because 19989027 - 2¹² = 19984931 is a prime.

It is a super-2 number, since 2×19989027² = 799122400813458, which contains 22 as substring.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 10002 + ... + 11832.

Almost surely, 2^19989027 is an apocalyptic number.

19989027 is a deficient number, since it is larger than the sum of its proper divisors (8923597).

19989027 is a wasteful number, since it uses less digits than its factorization.

19989027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3050 (or 3047 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 19989027 is about 4470.9089679840. The cubic root of 19989027 is about 271.3921104038.

It can be divided in two parts, 1998 and 9027, that added together give a square (11025 = 105²).

The spelling of 19989027 in words is "nineteen million, nine hundred eighty-nine thousand, twenty-seven".