19849156378 has 24 divisors (see below), whose sum is σ = 31639665600. Its totient is φ = 9337380288.

The previous prime is 19849156367. The next prime is 19849156399. The reversal of 19849156378 is 87365194891.

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 11 ways as a sum of consecutive naturals, for example, 2353453 + ... + 2361871.

It is an arithmetic number, because the mean of its divisors is an integer number (1318319400).

Almost surely, 2^19849156378 is an apocalyptic number.

19849156378 is a deficient number, since it is larger than the sum of its proper divisors (11790509222).

19849156378 is a wasteful number, since it uses less digits than its factorization.

19849156378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12534 (or 12517 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 61.

The spelling of 19849156378 in words is "nineteen billion, eight hundred forty-nine million, one hundred fifty-six thousand, three hundred seventy-eight".