19827240038540 has 48 divisors (see below), whose sum is σ = 46887643321344. Its totient is φ = 6977327870400.

The previous prime is 19827240038519. The next prime is 19827240038597. The reversal of 19827240038540 is 4583004272891.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1453603154 + ... + 1453616793.

It is an arithmetic number, because the mean of its divisors is an integer number (976825902528).

Almost surely, 2^{19827240038540} is an apocalyptic number.

19827240038540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19827240038540 is an abundant number, since it is smaller than the sum of its proper divisors (27060403282804).

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

19827240038540 is a wasteful number, since it uses less digits than its factorization.

19827240038540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2907219998 (or 2907219996 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 19827240038540 in words is "nineteen trillion, eight hundred twenty-seven billion, two hundred forty million, thirty-eight thousand, five hundred forty".