19219309940 has 48 divisors (see below), whose sum is σ = 41687944704. Its totient is φ = 7435190400.

The previous prime is 19219309877. The next prime is 19219310051. The reversal of 19219309940 is 4990391291.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1114262 + ... + 1131378.

It is an arithmetic number, because the mean of its divisors is an integer number (868498848).

Almost surely, 2^19219309940 is an apocalyptic number.

19219309940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19219309940 is an abundant number, since it is smaller than the sum of its proper divisors (22468634764).

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

19219309940 is a wasteful number, since it uses less digits than its factorization.

19219309940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18968 (or 18966 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 47.

The spelling of 19219309940 in words is "nineteen billion, two hundred nineteen million, three hundred nine thousand, nine hundred forty".