19788975 has 48 divisors (see below), whose sum is σ = 38291200. Its totient is φ = 9992160.

The previous prime is 19788973. The next prime is 19788983. The reversal of 19788975 is 57988791.

It is not a de Polignac number, because 19788975 - 2¹ = 19788973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19788971) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12054 + ... + 13596.

Almost surely, 2^19788975 is an apocalyptic number.

19788975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19788975 is a deficient number, since it is larger than the sum of its proper divisors (18502225).

19788975 is a wasteful number, since it uses less digits than its factorization.

19788975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581 (or 1570 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 54.

The square root of 19788975 is about 4448.4800775096. The cubic root of 19788975 is about 270.4837008412.

The spelling of 19788975 in words is "nineteen million, seven hundred eighty-eight thousand, nine hundred seventy-five".