19672989 has 32 divisors (see below), whose sum is σ = 31229184. Its totient is φ = 10782720.

The previous prime is 19672979. The next prime is 19672993. The reversal of 19672989 is 98927691.

It is a happy number.

It is not a de Polignac number, because 19672989 - 2¹¹ = 19670941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19672949) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62697 + ... + 63009.

It is an arithmetic number, because the mean of its divisors is an integer number (975912).

Almost surely, 2^19672989 is an apocalyptic number.

It is an amenable number.

19672989 is a deficient number, since it is larger than the sum of its proper divisors (11556195).

19672989 is a wasteful number, since it uses less digits than its factorization.

19672989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437.

The product of its digits is 489888, while the sum is 51.

The square root of 19672989 is about 4435.4243314479. The cubic root of 19672989 is about 269.9542172029.

The spelling of 19672989 in words is "nineteen million, six hundred seventy-two thousand, nine hundred eighty-nine".