19713632 has 12 divisors (see below), whose sum is σ = 38811276. Its totient is φ = 9856800.

The previous prime is 19713623. The next prime is 19713643. The reversal of 19713632 is 23631791.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 616051 = 19713632 / (1 + 9 + 7 + 1 + 3 + 6 + 3 + 2).

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, 307994 + ... + 308057.

It is an arithmetic number, because the mean of its divisors is an integer number (3234273).

Almost surely, 2^19713632 is an apocalyptic number.

It is an amenable number.

19713632 is a deficient number, since it is larger than the sum of its proper divisors (19097644).

19713632 is an equidigital number, since it uses as much as digits as its factorization.

19713632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616061 (or 616053 counting only the distinct ones).

The product of its digits is 6804, while the sum is 32.

The square root of 19713632 is about 4440.0036036021. The cubic root of 19713632 is about 270.1399914184.

Subtracting from 19713632 its sum of digits (32), we obtain a square (19713600 = 4440²).

The spelling of 19713632 in words is "nineteen million, seven hundred thirteen thousand, six hundred thirty-two".