19219139140 has 12 divisors (see below), whose sum is σ = 40360192236. Its totient is φ = 7687655648.

The previous prime is 19219139129. The next prime is 19219139237. The reversal of 19219139140 is 4193191291.

It can be written as a sum of positive squares in 2 ways, for example, as 7210047744 + 12009091396 = 84912^2 + 109586^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19219139093 and 19219139102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480478459 + ... + 480478498.

It is an arithmetic number, because the mean of its divisors is an integer number (3363349353).

Almost surely, 2^19219139140 is an apocalyptic number.

19219139140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19219139140 is an abundant number, since it is smaller than the sum of its proper divisors (21141053096).

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

19219139140 is a wasteful number, since it uses less digits than its factorization.

19219139140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960956966 (or 960956964 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 40.

The spelling of 19219139140 in words is "nineteen billion, two hundred nineteen million, one hundred thirty-nine thousand, one hundred forty".