19719958040 has 64 divisors (see below), whose sum is σ = 47172715200. Its totient is φ = 7402650112.

The previous prime is 19719958033. The next prime is 19719958073. The reversal of 19719958040 is 4085991791.

It is a Harshad number since it is a multiple of its sum of digits (53).

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, 153455 + ... + 250974.

It is an arithmetic number, because the mean of its divisors is an integer number (737073675).

Almost surely, 2^19719958040 is an apocalyptic number.

19719958040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19719958040 is an abundant number, since it is smaller than the sum of its proper divisors (27452757160).

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

19719958040 is a wasteful number, since it uses less digits than its factorization.

19719958040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404516 (or 404512 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 53.

The spelling of 19719958040 in words is "nineteen billion, seven hundred nineteen million, nine hundred fifty-eight thousand, forty".