19870541124 has 48 divisors (see below), whose sum is σ = 54420229248. Its totient is φ = 5523856128.

The previous prime is 19870541111. The next prime is 19870541129. The reversal of 19870541124 is 42114507891.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (19870541129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3193569 + ... + 3199784.

It is an arithmetic number, because the mean of its divisors is an integer number (1133754776).

Almost surely, 2^19870541124 is an apocalyptic number.

19870541124 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19870541124 is an abundant number, since it is smaller than the sum of its proper divisors (34549688124).

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

19870541124 is a wasteful number, since it uses less digits than its factorization.

19870541124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6393404 (or 6393402 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The spelling of 19870541124 in words is "nineteen billion, eight hundred seventy million, five hundred forty-one thousand, one hundred twenty-four".