19191549490 has 16 divisors (see below), whose sum is σ = 34547228352. Its totient is φ = 7676077744.

The previous prime is 19191549463. The next prime is 19191549529. The reversal of 19191549490 is 9494519191.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100947 + ... + 220393.

It is an arithmetic number, because the mean of its divisors is an integer number (2159201772).

Almost surely, 2^19191549490 is an apocalyptic number.

19191549490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19191549490 is a deficient number, since it is larger than the sum of its proper divisors (15355678862).

19191549490 is a wasteful number, since it uses less digits than its factorization.

19191549490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135521.

The product of its (nonzero) digits is 524880, while the sum is 52.

The spelling of 19191549490 in words is "nineteen billion, one hundred ninety-one million, five hundred forty-nine thousand, four hundred ninety".