19220993940 has 48 divisors (see below), whose sum is σ = 56651353920. Its totient is φ = 4855829760.

The previous prime is 19220993927. The next prime is 19220993983. The reversal of 19220993940 is 4939902291.

It is a self number, because there is not a number n which added to its sum of digits gives 19220993940.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 8429121 + ... + 8431400.

It is an arithmetic number, because the mean of its divisors is an integer number (1180236540).

Almost surely, 2^19220993940 is an apocalyptic number.

19220993940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19220993940 is an abundant number, since it is smaller than the sum of its proper divisors (37430359980).

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

19220993940 is a wasteful number, since it uses less digits than its factorization.

19220993940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16860552 (or 16860550 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 48.

The spelling of 19220993940 in words is "nineteen billion, two hundred twenty million, nine hundred ninety-three thousand, nine hundred forty".