19822991265 has 96 divisors (see below), whose sum is σ = 42903993600. Its totient is φ = 8225487360.

The previous prime is 19822991263. The next prime is 19822991269. The reversal of 19822991265 is 56219922891.

19822991265 is a `hidden beast` number, since 1 + 98 + 2 + 299 + 1 + 265 = 666.

It is not a de Polignac number, because 19822991265 - 2¹ = 19822991263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19822991263) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2452651 + ... + 2460719.

It is an arithmetic number, because the mean of its divisors is an integer number (446916600).

Almost surely, 2^19822991265 is an apocalyptic number.

19822991265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19822991265 is an abundant number, since it is smaller than the sum of its proper divisors (23081002335).

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

19822991265 is a wasteful number, since it uses less digits than its factorization.

19822991265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8807 (or 8804 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 54.

The spelling of 19822991265 in words is "nineteen billion, eight hundred twenty-two million, nine hundred ninety-one thousand, two hundred sixty-five".