19005953872 has 40 divisors (see below), whose sum is σ = 37410186944. Its totient is φ = 9352848384.

The previous prime is 19005953819. The next prime is 19005953887. The reversal of 19005953872 is 27835950091.

It is a super-2 number, since 2×19005953872² (a number of 21 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 233248 + ... + 304000.

Almost surely, 2^19005953872 is an apocalyptic number.

It is an amenable number.

19005953872 is a deficient number, since it is larger than the sum of its proper divisors (18404233072).

19005953872 is a wasteful number, since it uses less digits than its factorization.

19005953872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71027 (or 71021 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 49.

The spelling of 19005953872 in words is "nineteen billion, five million, nine hundred fifty-three thousand, eight hundred seventy-two".