19645629632 has 14 divisors (see below), whose sum is σ = 38984296428. Its totient is φ = 9822814784.

The previous prime is 19645629613. The next prime is 19645629637. The reversal of 19645629632 is 23692654691.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (19645629637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153481418 + ... + 153481545.

It is an arithmetic number, because the mean of its divisors is an integer number (2784592602).

Almost surely, 2^19645629632 is an apocalyptic number.

It is an amenable number.

19645629632 is a deficient number, since it is larger than the sum of its proper divisors (19338666796).

19645629632 is an equidigital number, since it uses as much as digits as its factorization.

19645629632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306962975 (or 306962965 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 53.

The spelling of 19645629632 in words is "nineteen billion, six hundred forty-five million, six hundred twenty-nine thousand, six hundred thirty-two".