19808211375 has 24 divisors (see below), whose sum is σ = 35707604400. Its totient is φ = 10564378800.

The previous prime is 19808211349. The next prime is 19808211377. The reversal of 19808211375 is 57311280891.

19808211375 is a `hidden beast` number, since 198 + 0 + 82 + 11 + 375 = 666.

It is not a de Polignac number, because 19808211375 - 2⁵ = 19808211343 is a prime.

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 19808211375.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19808211377) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8802525 + ... + 8804774.

It is an arithmetic number, because the mean of its divisors is an integer number (1487816850).

Almost surely, 2^19808211375 is an apocalyptic number.

19808211375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19808211375 is a deficient number, since it is larger than the sum of its proper divisors (15899393025).

19808211375 is a wasteful number, since it uses less digits than its factorization.

19808211375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17607320 (or 17607307 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The spelling of 19808211375 in words is "nineteen billion, eight hundred eight million, two hundred eleven thousand, three hundred seventy-five".