19909000755 has 192 divisors, whose sum is σ = 42567782400. Its totient is φ = 8406478080.

The previous prime is 19909000751. The next prime is 19909000763. The reversal of 19909000755 is 55700090991.

It is not a de Polignac number, because 19909000755 - 2² = 19909000751 is a prime.

It is a super-2 number, since 2×19909000755² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 19909000755.

It is not an unprimeable number, because it can be changed into a prime (19909000751) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 52530156 + ... + 52530534.

It is an arithmetic number, because the mean of its divisors is an integer number (221707200).

Almost surely, 2^19909000755 is an apocalyptic number.

19909000755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19909000755 is an abundant number, since it is smaller than the sum of its proper divisors (22658781645).

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

19909000755 is a wasteful number, since it uses less digits than its factorization.

19909000755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614 (or 611 counting only the distinct ones).

The product of its (nonzero) digits is 127575, while the sum is 45.

The spelling of 19909000755 in words is "nineteen billion, nine hundred nine million, seven hundred fifty-five", and thus it is an aban number.