19543940732 has 6 divisors (see below), whose sum is σ = 34201896288. Its totient is φ = 9771970364.

The previous prime is 19543940729. The next prime is 19543940749. The reversal of 19543940732 is 23704934591.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2442992588 + ... + 2442992595.

It is an arithmetic number, because the mean of its divisors is an integer number (5700316048).

Almost surely, 2^19543940732 is an apocalyptic number.

It is an amenable number.

19543940732 is a deficient number, since it is larger than the sum of its proper divisors (14657955556).

19543940732 is a wasteful number, since it uses less digits than its factorization.

19543940732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4885985187 (or 4885985185 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 47.

The spelling of 19543940732 in words is "nineteen billion, five hundred forty-three million, nine hundred forty thousand, seven hundred thirty-two".