19780132 has 6 divisors (see below), whose sum is σ = 34615238. Its totient is φ = 9890064.

The previous prime is 19780109. The next prime is 19780141. The reversal of 19780132 is 23108791.

It can be written as a sum of positive squares in only one way, i.e., 16597476 + 3182656 = 4074^2 + 1784^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19780094 and 19780103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2472513 + ... + 2472520.

Almost surely, 2^19780132 is an apocalyptic number.

It is an amenable number.

19780132 is a deficient number, since it is larger than the sum of its proper divisors (14835106).

19780132 is a wasteful number, since it uses less digits than its factorization.

19780132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4945037 (or 4945035 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 19780132 is about 4447.4860314564. The cubic root of 19780132 is about 270.4434049401.

The spelling of 19780132 in words is "nineteen million, seven hundred eighty thousand, one hundred thirty-two".