19408780938 has 16 divisors (see below), whose sum is σ = 38961868320. Its totient is φ = 6445542576.

The previous prime is 19408780933. The next prime is 19408780967. The reversal of 19408780938 is 83908780491.

It is not an unprimeable number, because it can be changed into a prime (19408780931) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6011020 + ... + 6014247.

It is an arithmetic number, because the mean of its divisors is an integer number (2435116770).

Almost surely, 2^19408780938 is an apocalyptic number.

19408780938 is an abundant number, since it is smaller than the sum of its proper divisors (19553087382).

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

19408780938 is a wasteful number, since it uses less digits than its factorization.

19408780938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12025541.

The product of its (nonzero) digits is 3483648, while the sum is 57.

It can be divided in two parts, 1940 and 8780938, that added together give a palindrome (8782878).

The spelling of 19408780938 in words is "nineteen billion, four hundred eight million, seven hundred eighty thousand, nine hundred thirty-eight".