19217298690 has 24 divisors (see below), whose sum is σ = 49964976828. Its totient is φ = 5124612960.

The previous prime is 19217298679. The next prime is 19217298703. The reversal of 19217298690 is 9689271291.

It can be written as a sum of positive squares in 2 ways, for example, as 17504083809 + 1713214881 = 132303^2 + 41391^2 .

It is a super-2 number, since 2×19217298690² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106762681 + ... + 106762860.

Almost surely, 2^19217298690 is an apocalyptic number.

19217298690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19217298690 is an abundant number, since it is smaller than the sum of its proper divisors (30747678138).

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

19217298690 is a wasteful number, since it uses less digits than its factorization.

19217298690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213525554 (or 213525551 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 54.

The spelling of 19217298690 in words is "nineteen billion, two hundred seventeen million, two hundred ninety-eight thousand, six hundred ninety".