19486743540 has 48 divisors (see below), whose sum is σ = 59523145920. Its totient is φ = 4724058880.

The previous prime is 19486743427. The next prime is 19486743557. The reversal of 19486743540 is 4534768491.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14762025 + ... + 14763344.

It is an arithmetic number, because the mean of its divisors is an integer number (1240065540).

Almost surely, 2^19486743540 is an apocalyptic number.

19486743540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19486743540 is an abundant number, since it is smaller than the sum of its proper divisors (40036402380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19486743540 is a wasteful number, since it uses less digits than its factorization.

19486743540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29525392 (or 29525390 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 19486743540 in words is "nineteen billion, four hundred eighty-six million, seven hundred forty-three thousand, five hundred forty".