19384405890 has 64 divisors (see below), whose sum is σ = 49275547776. Its totient is φ = 4863491072.

The previous prime is 19384405879. The next prime is 19384405913. The reversal of 19384405890 is 9850448391.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2532409 + ... + 2540051.

It is an arithmetic number, because the mean of its divisors is an integer number (769930434).

Almost surely, 2^19384405890 is an apocalyptic number.

19384405890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19384405890 is an abundant number, since it is smaller than the sum of its proper divisors (29891141886).

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

19384405890 is a wasteful number, since it uses less digits than its factorization.

19384405890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12643.

The product of its (nonzero) digits is 1244160, while the sum is 51.

The spelling of 19384405890 in words is "nineteen billion, three hundred eighty-four million, four hundred five thousand, eight hundred ninety".