19715746540 has 24 divisors (see below), whose sum is σ = 47317792032. Its totient is φ = 6759684480.

The previous prime is 19715746493. The next prime is 19715746601. The reversal of 19715746540 is 4564751791.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70413241 + ... + 70413520.

It is an arithmetic number, because the mean of its divisors is an integer number (1971574668).

Almost surely, 2^19715746540 is an apocalyptic number.

19715746540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19715746540 is an abundant number, since it is smaller than the sum of its proper divisors (27602045492).

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

19715746540 is a wasteful number, since it uses less digits than its factorization.

19715746540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140826777 (or 140826775 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 49.

The spelling of 19715746540 in words is "nineteen billion, seven hundred fifteen million, seven hundred forty-six thousand, five hundred forty".