19147127490 has 40 divisors (see below), whose sum is σ = 51484500540. Its totient is φ = 5105900448.

The previous prime is 19147127453. The next prime is 19147127501. The reversal of 19147127490 is 9472174191.

19147127490 is a `hidden beast` number, since 1 + 9 + 147 + 12 + 7 + 490 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18938989161 + 208138329 = 137619^2 + 14427^2 .

It is a super-2 number, since 2×19147127490² (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 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 19 ways as a sum of consecutive naturals, for example, 11818405 + ... + 11820024.

Almost surely, 2^19147127490 is an apocalyptic number.

19147127490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19147127490 is an abundant number, since it is smaller than the sum of its proper divisors (32337373050).

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

19147127490 is a wasteful number, since it uses less digits than its factorization.

19147127490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23638448 (or 23638439 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The spelling of 19147127490 in words is "nineteen billion, one hundred forty-seven million, one hundred twenty-seven thousand, four hundred ninety".